Q. Select the one which is not a mixture
1) Air
2) Gasoline
3) LPG
4) Distilled water
Q. Which of the following elements is not present in stainless steel
1) Iron
2) Trungsten
3) Chromium
4) Nickel
Q. Which one of the following statements is NOT correct?
1) The presence of NaCl increases the rate of setting of Plaster of Paris
2) Gypsum is added to the cement to slow down its rate of setting
3) All alkaline earth metal form hydrated salts
4) Barium and Strontium are found free in nature.
Q. With reference to ionic compounds, consider the following statements:
1. Ionic compounds are insoluble in alcohol.
2. Ionic compounds in the solid state are good conductors of electricity.
Which of the statements is/are correct?
1) Only 1
2) Only 2
3) Both 1 & 2
4) Neither 1 nor 2
Q. Which of the following is produced during the formation of photochemical smog?
1) Hydrocarbons
2) Nitrogen Oxides
3) Ozone
4) Methane
Q. Regarding the atom of a chemical element, the magnetic quantum number refers to
1) orientation
2) shape
3) size
4) spin
Q. Consider the following statements:
The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
1. To keep washing powder dry
2. To maintain the alkalinity of the powder
Which of the statements is/are correct?
1) Only 1
2) Only 2
3) Both 1 & 2
4) Neither 1 nor 2
Q. Which one of the following statement is correct?
1) Liquid Sodium is employed as a coolant in nuclear reactors
2) Calcium carbonate is an ingredient of toothpaste
3) Bordeaux mixture consists of Sodium sulphate and lime
4) Zinc amalgams are used as a dental filling
Q. Consider the following statements:
1. Steam at 100 degree C and boiling water at 100 degree C contains same amount of heat.
2. Latent heat of fusion of ice is equal to the latent heat of vaporization of water.
3. In an air-conditioner, heat is extracted from the room-air at the evaporator coils and is rejected out at the condenser coils.
Which of these statements is/are correct?
1) 1 & 2
2) 2 & 3
3) Only 2
4) Only 3
Q. A hydrogen-inflated polythene balloon is released from the surface of the earth. As the balloon rises to an altitude up in the atmosphere, it will
1) Decrease in size
2) Flatten into a disc-like shape
3) Increase in size
4) Maintain the same size and shape
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