-
question_answer1)
Read the given statements and select the correct option.
Statement 1: Baking soda does not taste sour. |
Statement 2: Bases are sour in taste while acids are bitter in taste. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
clear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
clear
C)
Statement 1 is true and statement 2 is false. done
clear
D)
Both statements 1 and 2 are false. done
clear
View Solution play_arrow
-
question_answer2)
Raghav categorized the following household items into acids and bases.
| Acids | | Bases |
1. | Lemon | 4. | Baking soda |
2. | Antacid | 5. | Vinegar |
5. | Tea | 6. | Curd |
Which of them are placed under the wrong category?
A)
3 and 5 done
clear
B)
2 and 6 done
clear
C)
3, 4 and 5 done
clear
D)
2, 5 and 6 done
clear
View Solution play_arrow
-
question_answer3)
Rima prepared an indicator paper by dipping a paper strip in a solution of X. She put a few drops of an unknown solution Y which contains \[{{H}^{+}}\] ions less than \[O{{H}^{-}}\] ions on this paper. She observed that the colour of paper turned yellow. What do you think was solution X?
A)
Red litmus solution done
clear
B)
Phenolphthalein done
clear
C)
Methyl orange done
clear
D)
Turmeric solution done
clear
View Solution play_arrow
-
question_answer4)
Match column I with column II and select the correct option from the codes given below.
Column I (Salts) | Column II (Uses) |
P. Baking soda | 1. In making fire-works |
Q. Nitre | 2. As a fungicide |
R. Blue vitriol | 3. In purification of water |
S. Phitkari | 4. In fire extinguishers |
A)
P-3; Q-2; R-4; S-1 done
clear
B)
P-4; Q-3; R-1; S-2 done
clear
C)
P-4; Q-1; R-2; S-3 done
clear
D)
P-2; Q-1; R-4; S-3 done
clear
View Solution play_arrow
-
question_answer5)
Sumedha took a spoon of turmeric powder and made a paste by adding little water to it. She cut thin strips of a paper and applied this paste on them. After drying she put few drops of given sample solutions (i)-(iv) on these strips. What would be the changes in the colour she observed?
(i) Amia Juice |
(ii) Lime water |
(iii) Common salt solution |
(iv) Baking soda solution |
A)
B)
C)
D)
View Solution play_arrow
-
question_answer6)
Read the given statements and select the correct option.
Statement 1: To neutralise the effect of a bee sting, that portion of the body is rubbed with moist baking soda. |
Statement 2: Baking soda contains sodium carbonate which neutralises the effect of acid injected by bee sting. |
A)
Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1. done
clear
B)
Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1. done
clear
C)
Statement 1 is true and statement 2 is false. done
clear
D)
Both statements 1 and 2 are false. done
clear
View Solution play_arrow
-
question_answer7)
Which of the following diagram(s) represent(s) alkalis and bases in the correct form?
A)
(i) only done
clear
B)
(iii) only done
clear
C)
(i) and (iv) only done
clear
D)
(ii) and (iii) only done
clear
View Solution play_arrow
-
question_answer8)
Observe the given figure carefully and choose the incorrect statement(s).
1. Large volume of acid should be added to a small volume of water slowly. |
2. The figure represents the process of concentrating dilute\[{{H}_{2}}S{{O}_{4}}\]. |
3. The process involves release of a large amount of heat. |
4. Water should not be stirred. |
A)
1 and 4 only done
clear
B)
2 and 3 only done
clear
C)
1, 2 and 4 only done
clear
D)
2 only done
clear
View Solution play_arrow
-
question_answer9)
Raghu used excessive chemical fertilizers in his field while Raman found the soil of his field to be basic in nature. What should they add to their fields to improve the quality of the soil?
A)
Raghu: Organic matter Raman: Quick lime done
clear
B)
Raghu: Quick lime Raman: Organic matter done
clear
C)
Both should add quick lime. done
clear
D)
Both should add organic matter. done
clear
View Solution play_arrow
-
question_answer10)
Match column I with column II and select the correct option from the codes given below.
Column I | Column II |
(P) Ammonium hydroxide | (i) Spinach |
(Q) Tartaric acid | (ii) Window cleaner |
(R) Zinc carbonate | (iii) Tamarind |
(S) Oxalic acid | (iv) Calamine |
A)
(P) - (ii), (Q) - (iii), (R) - (iv), (S) - (i) done
clear
B)
(P) - (iv), (Q) - (i), (R) - (ii), (S) - (iii) done
clear
C)
(P) - (ii), (Q) - (iii), (R) - (i), (S) - (iv) done
clear
D)
(P) - (iii), (Q) - (ii), (R) - (iv), (S) - (i) done
clear
View Solution play_arrow
-
question_answer11)
Kartik performed the following experiment by taking few solutions and phenolphthalein indicator. Identify p, q and r in his experiment.
A)
p \[\to \]Acid, q \[\to \]Acid, r\[\to \]Base done
clear
B)
p \[\to \] Base, q\[\to \] Acid, r\[\to \] Base done
clear
C)
p \[\to \] Base, q\[\to \] Base, r\[\to \]Acid done
clear
D)
p \[\to \] Base, q\[\to \] Acid, r\[\to \]Acid done
clear
View Solution play_arrow
-
question_answer12)
Which of the following processes represents a neutralisation reaction?
A)
Applying vinegar on wasp sting done
clear
B)
Brushing our teeth with toothpaste done
clear
C)
Sodium hydroxide reacts with hydrochloric acid to form sodium chloride. done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer13)
The given figure shows the colour changes in test tubes I, II and III, when China rose indicator is added to them. The respective solutions in test tubes I, II and III are
A)
B)
C)
D)
View Solution play_arrow
-
question_answer14)
A)
(i) and (iii) only done
clear
B)
(ii) and (iv) only done
clear
C)
(i), (ii) and (iii) only done
clear
D)
(i), (iii) and (iv) only done
clear
View Solution play_arrow
-
question_answer15)
Rahul took a turmeric paper and tried to draw flowers on it with the help of cotton buds dipped in solutions P and O. The flower drawn with solution P was not visible while one drawn with solution Q turned red.
|
Solutions P and Q could be respectively
|
A)
Lime water and lemon juice done
clear
B)
Vinegar and soap solution done
clear
C)
Common salt solution and baking soda done
clear
D)
Both (B) and (C). done
clear
View Solution play_arrow
-
question_answer16)
Which of the following statements are correct?
I. The tangy taste of cola drinks is due to carbonic acid which is an organic acid. |
II. Inorganic acids are prepared artificially in the industries and are extremely corrosive. |
III. Hydrochloric acid reacts with metals to varying degrees therefore, it is stored in glass bottles. |
IV. Organic acids are weak acids and are used as food supplements. |
A)
I, II and III only done
clear
B)
I and IV only done
clear
C)
II and IV only done
clear
D)
All of these done
clear
View Solution play_arrow
-
question_answer17)
Study the given Venn diagram carefully.
|
|
Identify 1, 2 and 3.
|
A)
B)
C)
D)
View Solution play_arrow
-
question_answer18)
Ishaan tested the nature of a few common substances with different indicators and recorded his observations as follows :
Substance P turned methyl orange yellow.
|
Substance Q turned phenolphthalein colorless.
|
Substance R did not have any effect on blue or red litmus.
|
Substance S turned China rose indicator green.
|
P, Q, R and S could be respectively
|
A)
Lemon juice, fermented milk, salt solution and milk of magnesia. done
clear
B)
Sugar solution, vinegar, water and curd. done
clear
C)
Lime water, apple juice, sugar solution and saliva done
clear
D)
None of these. done
clear
View Solution play_arrow
-
question_answer19)
A science teacher has arranged the following; sets of test tubes as
|
|
She asked the students to find out the incorrect statement about the above experimental set-up.
|
A)
Turmeric solution turns red in test tubes 1 and 3. done
clear
B)
China rose indicator turns green in test tubes 2 and 4. done
clear
C)
Methyl orange turns yellow in test tubes 1 and 3. done
clear
D)
Phenolphthalein remains colorless in test tubes 2 and 4. done
clear
View Solution play_arrow
-
question_answer20)
Consider the following statements (I-IV) and fill in the blanks by choosing the appropriate option.
I. An antacid such as ___P___ is used to cure indigestion. |
II. Lime water contains ___Q___, which turns milky with carbon dioxide. |
III. Soap solution is basic due to presence of ___R___. It turns turmeric stain of shirt to red. |
IV. Baking soda is ___S___ which reacts with vinegar to evolve carbon dioxide gas. |
A)
B)
C)
D)
View Solution play_arrow