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question_answer1)
Plaster of parts is obtained -
A)
by adding water to calcium sulphate done
clear
B)
by adding sulphuric acid to calcium hydroxide done
clear
C)
by heating gypsum to a very high temperature done
clear
D)
by heating gypsum to 373 K. done
clear
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question_answer2)
Bleaching powder gives smell of chlorine because it-
A)
is unstable done
clear
B)
gives chlorine on exposure to atmosphere done
clear
C)
is a mixture of chlorine and slaked lime done
clear
D)
contains excess of chlorine done
clear
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question_answer3)
Why bases are kept in glass bottles?
A)
Bases produce \[O{{H}^{-}}\] ions in aqueous solutions done
clear
B)
Basic solutions are conducting in nature done
clear
C)
Bases are corrosive in nature done
clear
D)
Bases have soapy texture done
clear
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question_answer4)
Which one of the following salts when dissolved in water makes the solution basic? [NDA]
A)
Sodium chloride done
clear
B)
Copper sulphate done
clear
C)
Ferric chloride done
clear
D)
Sodium acetate done
clear
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question_answer5)
Which of the following salts are insoluble in water? [NDA]
A)
Chlorides of Fe and Mn done
clear
B)
Nitrates of Ag and Pb done
clear
C)
Carbonates of Pb and Cu done
clear
D)
Phosphates of Na and \[N{{H}_{4}}\] done
clear
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question_answer6)
Two elements gallium and oxygen combine to form a compound \[G{{a}_{2}}{{O}_{3}}\]. Which among the following is the valency of gallium? [NDA]
A)
1 done
clear
B)
2 done
clear
C)
3 done
clear
D)
4 done
clear
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question_answer7)
Arrange the following bases in increasing order of their, basic strength [NDA]
1. Sodium hydroxide |
2. Magnesium hydroxide |
3. Aluminium hydroxide |
4. Ammonium hydroxide |
Select the correct answer using the code given below
A)
A-4, B-2, C-1, D-3 done
clear
B)
A-4, B-1, C-2, D-3 done
clear
C)
A-4, B-3, C-2, D-1 done
clear
D)
A-1, B-2, C-3, D-4 done
clear
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question_answer8)
Which one among the following is not a property of salt? [NDA]
A)
Salts have ordered packing arrangements called lattices done
clear
B)
Salts have low melting points but high boiling points done
clear
C)
Salts are brittle done
clear
D)
Salts conduct electricity when dissolved in water or even in the molten state done
clear
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question_answer9)
Which among the following statements with regard to pH scale is/are correct? [NDA]
I. It is a logarithmic scale. |
II. The scale is limited to 0-14 because the ionic product of water is about \[{{10}^{-14}}\] |
III. The lower the value of pH, the greater is the acidity of the solution. |
Select the correct answer using the code given below
A)
I and II only done
clear
B)
I, II and III done
clear
C)
I and III only done
clear
D)
II only done
clear
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question_answer10)
Statement I: Metal ions are Lewis acids. |
Statement II: Metal ions are electron pair acceptors. [NDA] |
A)
Both the statements individually true and Statement II is the correct explanation of Statement I. done
clear
B)
Both the statements are individually true but Statement II is not correct explanation of Statement I. done
clear
C)
Statement I is true but Statement II is false. done
clear
D)
Statement I is false but Statement II is true. done
clear
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question_answer11)
Neutral water with pH about 7 becomes slightly acidic when aerated. This is because [NDA]
A)
oxygen from air is dissolved in the water which makes the water acidic done
clear
B)
dirt, which get contaminated with the water during aeration makes the water acidic done
clear
C)
ultraviolet radiation dissociates water molecules and makes water acidic done
clear
D)
carbon-dioxide from air is dissolved done
clear
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question_answer12)
The concentration of hydrochloric acid in a given solution is \[{{10}^{-8}}\]M. What is the value of pH for this solution? [NDA]
A)
7 done
clear
B)
> 7 but not 14 done
clear
C)
<7 done
clear
D)
14 done
clear
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question_answer13)
Human stomach produces acid 'X' which helps in digestion of food. Acid 'X' is [NDA]
A)
acetic acid done
clear
B)
methanoic acid done
clear
C)
hydrochloric acid done
clear
D)
citric acid done
clear
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question_answer14)
Bases turn red litmus blue and acids turn blue litmus red. A student tested a liquid with a red litmus paper and it stayed red with no change. This shows that the liquid [NDA]
A)
must be pure water done
clear
B)
must be an acid done
clear
C)
is not a base done
clear
D)
is neither a base nor an acid done
clear
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question_answer15)
Which of the following statements regarding oxidation and reduction are correct? [NDA]
1. In oxidation, loss of electron takes place whereas in reduction, gain of electron takes place. |
2. In oxidation, gain of electron takes place whereas in reduction, loss of electron takes place. |
3. Oxidizing agent decreases the oxidation number but reducing agent increases the oxidation number. |
4. Oxidizing agent increases the oxidation number but reducing agent reduces the oxidation number. |
Select the correct answer using the code given below: Code:
A)
1 and 3 done
clear
B)
2 and 4 done
clear
C)
2 and 3 done
clear
D)
1 and 4 done
clear
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question_answer16)
The following equation is an example of a redox reaction, in which \[C{{l}_{2}}\] is the oxidizing agent and \[FeB{{r}_{3}}\] is the reducing agent:
\[2FeB{{r}_{3}}\,\,(aq)\,\,+\,\,3C{{l}_{2}}\,\,(g)=2FeCl\,{{\,}_{3}}(aq)\,\,+\,\,3B{{r}_{2}}\,\,(1)\] |
Which one among the following statements is incorrect for this redox reaction? [NDA] |
A)
Oxidizing agents are themselves reduced done
clear
B)
Reducing agents gain or appear to gain electrons done
clear
C)
Reducing agents are themselves oxidized done
clear
D)
Oxidizing agents oxidize other substances done
clear
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question_answer17)
Which one among the following is the correct order of strength of acids? [NDA]
A)
\[{{H}_{2}}S{{O}_{4}}>{{H}_{3}}P{{O}_{3}}>C{{H}_{3}}COOH\] done
clear
B)
\[{{H}_{3}}P{{O}_{3}}>{{H}_{2}}S{{O}_{4}}>C{{H}_{3}}COOH\] done
clear
C)
\[C{{H}_{3}}COOH>{{H}_{3}}P{{O}_{3}}>{{H}_{2}}S{{O}_{4}}\] done
clear
D)
\[C{{H}_{3}}COOH>{{H}_{2}}S{{O}_{4}}>{{H}_{3}}P{{O}_{3}}\] done
clear
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question_answer18)
Which one among the following is an electrochemical cell that cannot be charged? [NDA]
A)
Electrolytic cell done
clear
B)
Storage cell done
clear
C)
Primary cell done
clear
D)
Fuel cell done
clear
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question_answer19)
The pH of fresh milk is 6. When it turns sour, the pH [NDA]
A)
becomes < 6 done
clear
B)
remains the same i.e., 6 done
clear
C)
becomes > 6 done
clear
D)
becomes neutral, i.e., 7 done
clear
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question_answer20)
Which one among the following is a double salt? [NDA]
A)
\[{{K}_{4}}[Fe{{(CN)}_{6}}]\] done
clear
B)
\[{{K}_{2}}S{{O}_{4}}.A{{l}_{2}}{{(S{{O}_{4}})}_{3}}.24{{H}_{2}}O\] done
clear
C)
\[CuS{{O}_{4}}.5{{H}_{2}}O\] done
clear
D)
\[NaCl\] done
clear
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question_answer21)
Statement I: Addition of water to an aqueous solution of HCl decreases the pH. [CDS] |
Statement II: Addition of water suppresses the ionisation of HCl. |
A)
Both the statements are individually true and Statement II is the correct explanation of Statement I done
clear
B)
Both the statements are individually true but Statement II is not the correct explanation of Statement I done
clear
C)
Statement I is true, but Statement II is false done
clear
D)
Statement I is false, but Statement II is true done
clear
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question_answer22)
The pH of fresh ground water slightly decreases upon exposure to air because [CDS]
A)
carbon dioxide from air is dissolved in the water done
clear
B)
oxygen from air is dissolved in the water done
clear
C)
the dissolved carbon dioxide of the ground water escapes into air done
clear
D)
the dissolved oxygen of the ground water escapes into air done
clear
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question_answer23)
On the labels of the bottles, some soft drinks are claimed to be acidity regulators. They regulate acidity using [CDS]
A)
carbon dioxide done
clear
B)
bicarbonate salts done
clear
C)
Both [a] and [b] done
clear
D)
carbon dioxide and lime done
clear
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question_answer24)
Antacids are commonly used to get rid of acidity in the stomach. A commonly used antacid is [CDS]
A)
sodium hydrogen phthalate done
clear
B)
magnesium hydroxide done
clear
C)
calcium hydroxide done
clear
D)
manganese acetate done
clear
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question_answer25)
Which of the following is not correct about Baking Soda? [CDS]
A)
It is used in soda acid fire extinguisher done
clear
B)
It is added for faster cooking. done
clear
C)
It is a corrosive base done
clear
D)
It neutralizes excess acid in the stomach done
clear
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question_answer26)
The acid in gastric juice is [NDA]
A)
acetic acid done
clear
B)
nitric acid done
clear
C)
hydrochloric acid done
clear
D)
sulphuric acid done
clear
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question_answer27)
Removal of impurities from ore is known as -
A)
crushing and grinding done
clear
B)
concentration of ore done
clear
C)
calcination done
clear
D)
roasting done
clear
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question_answer28)
Aluminium is used in thermite welding because -
A)
aluminium is a light metal done
clear
B)
aluminium has more affinity for oxygen done
clear
C)
aluminium is a strong oxidising agent done
clear
D)
aluminium is a reactive metal done
clear
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question_answer29)
Which method is employed for obtaining a pure metal?
A)
Froth floatation done
clear
B)
Electrolytic refining done
clear
C)
Magnetic separation done
clear
D)
Gravity separation done
clear
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question_answer30)
|
Column-I
|
|
Column-II
|
A.
|
Hardest Non-metal
|
P.
|
Graphite
|
B.
|
Non-metal conducts electricity
|
Q.
|
Sulphur
|
C.
|
Non-metal with lustre
|
R.
|
Diamond (Carbon)
|
D.
|
Non-metal used as fungicide
|
S.
|
Iodine
|
A)
A-R; B-P; C-S; D-Q done
clear
B)
A-Q; B-P; C-S; D-R done
clear
C)
A-P; B-R; C-S; D-Q done
clear
D)
A-R; B-P; C-Q; D-S done
clear
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question_answer31)
|
Column-I (Alloy)
|
|
Column-II (Composition of Elements)
|
A.
|
Steel
|
P.
|
Cu and Sn
|
B.
|
Brass
|
Q.
|
Cu and Zn
|
C.
|
Bronze
|
R.
|
Fe, C and Cr
|
D.
|
Magnalium
|
S.
|
Al and Mg
|
A)
A-Q; B-R; C-P; D-S done
clear
B)
A-R; B-Q; C-P; D-S done
clear
C)
A-Q; B-R; C-S; D-P done
clear
D)
A-R; B-Q; C-S; D-P done
clear
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question_answer32)
|
Column-I (Product)
|
|
Column-II (Name of alloy)
|
A.
|
Aircrafts
|
P.
|
Stainless steel
|
B.
|
Utensils
|
Q.
|
Bronze
|
C.
|
Medals
|
R.
|
Magnalium
|
D.
|
Balance beam
|
S.
|
Duralumin
|
A)
A-S; B-P; C-Q; D-R done
clear
B)
A-P; B-S; C-Q; D-R done
clear
C)
A-S; B-P; C-R; D-Q done
clear
D)
A-P; B-S; C-R; D-Q done
clear
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question_answer33)
What is anode mud?
A)
Fan of anode done
clear
B)
Metal of anode done
clear
C)
Impurities collected at anode in electrolysis during purification of metals done
clear
D)
All of these done
clear
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question_answer34)
Food cans are coated with tin and not with zinc because [CDS]
A)
zinc is costlier than tin. done
clear
B)
zinc has a higher melting point than tin. done
clear
C)
zinc is more reactive than tin. done
clear
D)
zinc is less reactive than tin. done
clear
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question_answer35)
|
Column-I
|
|
Column-II
|
A.
|
Titanium
|
P.
|
Coinage metal
|
B.
|
Palladium
|
Q.
|
Fuel
|
C.
|
Uranium
|
R.
|
Catalyst
|
D.
|
Platinum
|
S.
|
Strategic metal
|
A)
A-S; B-R; C-Q; D-P done
clear
B)
A-P; B-R; C-Q; D-S done
clear
C)
A-R; B-S; C-Q; D-P done
clear
D)
A-S; B-Q; C-R; D-P done
clear
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question_answer36)
'Yellow cake', an item of smuggling across border is [IAS Prelim]
A)
a crude form of heroin done
clear
B)
a crude form of cocaine done
clear
C)
uranium oxide done
clear
D)
unrefined gold done
clear
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question_answer37)
Which one of the following materials is very hard and very ductile? [IAS Prelim]
A)
Carborundum done
clear
B)
Tungsten done
clear
C)
Cast iron done
clear
D)
Nichrome done
clear
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question_answer38)
Match List I with List II and select the correct answer using the codes given below the lists: [IAS Prelim]
|
List-I
|
|
List-II
|
A.
|
Blue vitriol
|
1.
|
Sodium bicarbonate
|
B.
|
Epsom salt
|
2.
|
Sodium hydroxide
|
C.
|
Baking soda
|
3.
|
Magnesium sulphate
|
D.
|
Caustic soda
|
4.
|
Copper sulphate
|
A)
A-3; B-4; C-2; D-1 done
clear
B)
A-4; B-3; C-2; D-1 done
clear
C)
A-3; B-4; C-1; D-2 done
clear
D)
A-4; B-3; C-1; D-2 done
clear
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question_answer39)
Match List-I with List-II and select the correct answer using the codes given below the lists: [IAS Prelim]
|
List-I
|
|
List-II
|
A.
|
Potassium bromide
|
1.
|
Fertiliser
|
B.
|
Potassium nitrate
|
2.
|
Photography
|
C.
|
Potassium sulphate
|
3.
|
Bakery
|
D.
|
Monopotassium
|
4.
|
Gun powder tartarate
|
Codes:
A)
A-2; B-4; C-1; D-3 done
clear
B)
A-2; B-3; C-1; D-4 done
clear
C)
A-4; B-2; C-3; D-1 done
clear
D)
A-4; B-2; C-1; D-3 done
clear
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question_answer40)
|
List-I (Mineral)
|
|
List-II Industries in which largely [CDS]
|
A.
|
Limestone
|
1.
|
Cement
|
B.
|
Copper
|
2.
|
Electrical goods
|
C.
|
Bauxite aeroplanes
|
3.
|
Manufacture of
|
D.
|
Manganese
|
4.
|
Steel
|
A)
A-3, B-4, C-1, D-2 done
clear
B)
A-1, B-2, C-3, D-4 done
clear
C)
A-3, B-2, C-1, D-4 done
clear
D)
A-1, B-4, C-3, D-2 done
clear
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