Micro-organisms are utilized in the making of:
A)
curd
done
clear
B)
wine
done
clear
C)
bread
done
clear
D)
all of these
done
clear
E)
none of these
done
clear
View Answer play_arrow
Which one of the following statements is correct for ploughing?
A)
It is the process of scattering seeds in the soil
done
clear
B)
It is the process of loosening and turning the soil
done
clear
C)
It is the process of adding manure to the soil
done
clear
D)
It is the process of supplying water to crop
done
clear
E)
None of these
done
clear
View Answer play_arrow
Diameter of the planet saturn is about:
A)
4880 km
done
clear
B)
12680 km
done
clear
C)
120000 km
done
clear
D)
3000000 km
done
clear
E)
None of these
done
clear
View Answer play_arrow
Choose the incorrect statement from the following.
A)
Bacteria are single-celled organisms
done
clear
B)
Algae can make their own food by photo synthesis
done
clear
C)
Protozoa are a group of prokaryotes
done
clear
D)
Fungi are a group of organisms which do not contain chlorophyll
done
clear
E)
None of these
done
clear
View Answer play_arrow
Ram: Vomiting, headache and pain in abdomen are symptoms of food poisoning.
Raman: Micro-organisms play very important role in nitrogen cycle.
Rajesh: The method of pasteurization can be used for the preservation of milk.
Who of the following is correct?
A)
Ram and Raman
done
clear
B)
Raman and Rajesh
done
clear
C)
Ram and Rajesh
done
clear
D)
All of them
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following statements about rayon is incorrect?
A)
Rayon is a synthetic fibre
done
clear
B)
Rayon is regarded as artificial silk
done
clear
C)
Rayon is obtained by the chemical treatment of wood pulp
done
clear
D)
Rayon can not be used for making clothes
done
clear
E)
None of these
done
clear
View Answer play_arrow
Find the odd one out from the following.
A)
Germanium
done
clear
B)
Arsenic
done
clear
C)
Tellurium
done
clear
D)
Fluorine
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following statements about coal is incorrect?
A)
Coal is a combustible substance
done
clear
B)
Coal mainly consists of carbon
done
clear
C)
Coke is obtained by the destructive distillation of coal
done
clear
D)
When coal is heated in air, it burns to produce mainly methane gas
done
clear
E)
None of these
done
clear
View Answer play_arrow
Polythene is a plastic which is obtained by the polymerization of a chemical compound known as:
A)
PVC
done
clear
B)
ester
done
clear
C)
ethane
done
clear
D)
hydrochloric acid
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following will form basic oxide when reacts with oxygen?
A)
Sulphur
done
clear
B)
Chlorine
done
clear
C)
Nitrogen
done
clear
D)
Carbon
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not obtained by refining of petroleum?
A)
Paraffin wax
done
clear
B)
Lubricating oil
done
clear
C)
Kerosene
done
clear
D)
Coal tar
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which among the following has the lowest calorific value?
A)
Hydrogen gas
done
clear
B)
Wood
done
clear
C)
LPG
done
clear
D)
CNG
done
clear
E)
None of these
done
clear
View Answer play_arrow
Bandipur National Park is located in which one of the following states of India?
A)
Kerala
done
clear
B)
Karnataka
done
clear
C)
West Bengal
done
clear
D)
Assam
done
clear
E)
None of these
done
clear
View Answer play_arrow
Friction is harmful in which one of the following cases?
A)
Runnings machine
done
clear
B)
Applying brakes
done
clear
C)
Walking
done
clear
D)
Writing
done
clear
E)
None of these
done
clear
View Answer play_arrow
Sound will be produced in which one of the following cases?
A)
When a stretched rubber band vibrates
done
clear
B)
When our vocal cords vibrate
done
clear
C)
When sitar strings vibrate
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not the part of a cell?
A)
Plasma membrane
done
clear
B)
Cytoplasm
done
clear
C)
Ribosome
done
clear
D)
Mitochondria
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is the green coloured organelle present in the cytoplasm of only plant cell?
A)
Cell wall
done
clear
B)
Mitochondria
done
clear
C)
Chloroplast
done
clear
D)
Vacuole
done
clear
E)
None of these
done
clear
View Answer play_arrow
Good fuels have:
A)
low ignition temperature and high calorific value
done
clear
B)
high ignition temperature and low calorific value
done
clear
C)
low ignition temperature and low calorific value
done
clear
D)
high ignition temperature and high calorific value
done
clear
E)
None of these
done
clear
View Answer play_arrow
A biosphere reserve is a large protected area set aside for the conservation of:
A)
wildlife
done
clear
B)
fossil fuels
done
clear
C)
marine life
done
clear
D)
corals
done
clear
E)
None of these
done
clear
View Answer play_arrow
Chromosome are present in which one of the following parts of cell?
A)
Plasma membrane
done
clear
B)
Nucleus
done
clear
C)
Ribosome
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
Who of the following is correct? Ajay: In asexual reproduction, two parents are needed to produce a new organism. Abhay: In sexual reproduction, only one parent is needed to produce a new organism. Abhinav: Amoeba and hydra reproduces by asexual reproduction whereas cat and dog reproduces by sexual reproduction.
A)
Ajay
done
clear
B)
Abhay
done
clear
C)
Abhinav
done
clear
D)
All of them
done
clear
E)
None of these
done
clear
View Answer play_arrow
The reproductive life of a women starts at menarche and ends at:
A)
puberty
done
clear
B)
menopause
done
clear
C)
menstruation
done
clear
D)
adolescence
done
clear
E)
None of these
done
clear
View Answer play_arrow
Two forces A and B act on an object in the opposite directions. A is bigger than B. The net force on the object is:
A)
(a)\[A+B\] acting in the direction of A
done
clear
B)
(b)\[A-B\]acting in the direction of A
done
clear
C)
(c)\[A+B\]acting in the direction of B
done
clear
D)
(d)\[A-B\]acting in the direction of B
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following statements about the magnetic force is incorrect?
A)
The force exerted by a magnet is called magnetic force
done
clear
B)
Magnetic force is a non-contact force
done
clear
C)
Magnetic force has only magnitude
done
clear
D)
Magnetic force between a magnet and an iron object is always that of attraction
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is not a part of female reproductive system in human?
A)
Ovaries
done
clear
B)
Scrotal sac
done
clear
C)
Oviduct
done
clear
D)
Vagina
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following changes does not occur in boys during puberty?
A)
Growth of hair on face in the form of moustache and beard
done
clear
B)
Releasing of sperms by ovaries
done
clear
C)
Rapid increase in height
done
clear
D)
Broadening of chest and shoulder
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following is correct about friction?
A)
Friction can stop a moving object
done
clear
B)
Friction can change the direction of a moving object
done
clear
C)
Friction can make a moving object move faster
done
clear
D)
Friction can change the nature of material of a moving object
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which part of the ear consists of three interlocked bones?
A)
Outer ear
done
clear
B)
Middle ear
done
clear
C)
Inner ear
done
clear
D)
Both outer ear and middle ear
done
clear
E)
None of these
done
clear
View Answer play_arrow
In solids (like metals), electricity is carried by electrons but in liquids electricity is carried by:
A)
Atoms
done
clear
B)
Ions
done
clear
C)
Protons
done
clear
D)
Neutrons
done
clear
E)
None of these
done
clear
View Answer play_arrow
When a glass rod is rubbed with a piece of silk cloth, then:
A)
the glass rod and the silk cloth both acquire positive charges
done
clear
B)
the glass rod becomes positively charged while the silk cloth becomes negatively charged
done
clear
C)
the glass rod and the silk cloth both ac- quire negative charges
done
clear
D)
the glass rod becomes negatively charged while the silk cloth becomes positively charged
done
clear
E)
None of these
done
clear
View Answer play_arrow
Choose the incorrect statement from the following.
A)
The ray of light which falls on the mirror surface is called incident ray
done
clear
B)
The ray of light which is sent back by mirror is called reflected ray
done
clear
C)
The point at which incident ray intersects the reflected ray is called point of incidence
done
clear
D)
The normal is a line drawn at right angle to the mirror surface at the point of incidence
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following in the figure given below represents emergent ray?
A)
NE
done
clear
B)
GH
done
clear
C)
EF
done
clear
D)
FS
done
clear
E)
None of these
done
clear
View Answer play_arrow
Find the odd one out from the following.
A)
Ursa major
done
clear
B)
Proxima centauri
done
clear
C)
Orion
done
clear
D)
Cassiopeia
done
clear
E)
None of these
done
clear
View Answer play_arrow
Choose the incorrect statement.
A)
The destruction of ozone layer by CFCs will allow the extremely harmful ultra violet radiations of the sun to reach the earth.
done
clear
B)
The two extremely harmful effects of air pollution on the environment are acid rain and weakening of magnetosphere of earth
done
clear
C)
Sulphur dioxide gas in the polluted air causes respiratory problems
done
clear
D)
All of these
done
clear
E)
None of these
done
clear
View Answer play_arrow
Which one of the following gases can cause acid rain?
A)
Hydrogen
done
clear
B)
Sulphur dioxide
done
clear
C)
Nitrogen
done
clear
D)
Helium
done
clear
E)
None of these
done
clear
View Answer play_arrow
The iris of our eye has a hole at its centre known as:
A)
pupil
done
clear
B)
cornea
done
clear
C)
retina
done
clear
D)
eye-lens
done
clear
E)
None of these
done
clear
View Answer play_arrow
Sickle is used to:
A)
harvest the crop
done
clear
B)
irrigate the crop field
done
clear
C)
scatter seed in the soil
done
clear
D)
add manure to the soil
done
clear
E)
None of these
done
clear
View Answer play_arrow
The following experimental setup demonstrates the chemical effect of electric current by passing current through acidified water. Choose the correct option
A)
Oxygen gas is formed at the positive electrode and hydrogen gas is formed at the negative electrode
done
clear
B)
Hydrogen gas is formed at the positive electrode and oxygen gas is formed at the negative electrode
done
clear
C)
HCl is formed at the positive electrode and\[{{H}_{2}}S{{O}_{4}}\] is formed at the negative electrode
done
clear
D)
\[{{H}_{2}}S{{O}_{4}}\]is formed at the positive electrode and HCI is formed at the negative electrode
done
clear
E)
None of these
done
clear
View Answer play_arrow
The gold-leaf electroscope can be used to:
A)
detect electric charge only
done
clear
B)
detect and measure electric charge only
done
clear
C)
detect, measure and find the nature of electric charge
done
clear
D)
all of these
done
clear
E)
none of these
done
clear
View Answer play_arrow
Calculate the pressure when a force of 200 N is exerted on an area of\[10\,\,{{m}^{2}}\].
A)
10 Pa
done
clear
B)
20 Pa
done
clear
C)
40 Pa
done
clear
D)
60 Pa
done
clear
E)
None of these
done
clear
View Answer play_arrow