Q. Which of the following statements about a fluid at rest in a cup is/ are correct ?
1. Pressure is same at all the points in the fluid.
2. Pressure is exerted on the walls.
3. Pressure exists everywhere in the fluid.
Select the correct answer using the code given below :
1) 1 and 2 only
2) 2 and 3 only
3) 1 only
4) 1, 2 and 3
Q. Which one of the following devices is used to measure atmospheric pressure ?
1) Ammeter
2) Barometer
3) Potentiometer
4) Lactometer
Q. Which one of the following is the number of water molecules that share with two formula unit CaSO4, in plaster of Paris ?
1) One
2) Two
3) Five
4) Ten
Q. How is carbon black obtained ?
1) By heating wood at high temperature in absence of air
2) By heating coal at high temperature in absence of air
3) By burning hydrocarbons in a limited supply of air
4) By heating coal at high temperature in presence of air
Q. Which one of the following properties is not true for graphite ?
1) Hybridisation of each carbon atom is sp3
2) Hybridisation of each carbon atom is sp2
3) Electrons are delocalized over the whole sheet of atoms
4) Each layer is composed of hexagonal rings
Q. Which one of the following is the purest form of Carbon ?
1) Charcoal
2) Coke
3) Fullerene
4) Carbon black
Q. The Poisonous nature of Carbon monoxide (CO) is due to its -
1) insolubility in water
2) ability to form a complex with haemoglobin
3) ability to reduce some metal oxides
4) property of having one sigma bond
Q. Which one of the following elements is needed in the human body to transfer electrical signals by nerve cells ?
1) Lithium
2) Sodium
3) Rubidium
4) Caesium
Q. Which one of the following group of organisms forms a food chain ?
1) Grass, human and fish
2) Grass, goat and human
3) Tree, tree cutter and tiger
4) Goat, cow and human
Q. Which one of the following types of tissues will have contractile proteins ?
1) Nervous tissue
2) Muscle tissue
3) Bone tissue
4) Blood tissue
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