Q.1:- Milk is a ?
- None of these
Q.2:- Which one of the following mixture is homogeneous ?
- Starch and Sugar
- Methanol and Water
- Calcium Carbonate and Calcium Bicarbonate
- Graphite and Charcoal
Q.3:- Positive ions are formed from neutral atoms by loss of ?
- Nuclear Charge
Q.4:- Wave length of X-rays is of the order of ?
- 1 mm
- 1 cm
- 1 micron
- 1 angstrom
Q.5:- The atoms of the elements which have same number of neutrons are called ?
Q.6:- Group displacement law was given by ?
- Soddy and Fajan
Q.7:- Which one of the following is not radioactive ?
Q.8:- Of the following elements, which one has the same oxidation state in all of its compounds ?
Q.9:- The oxidation number of S in Na2S4O6 is ?
Q.10:- The pH scale had been given by ?
Q.11:- Which of the following gases will have the highest rate of diffusion ?
Q.12:- Enzymes are ?
Q.13:- During the evaporation of a liquid ?
- The enthalpy decreases
- The enthalpy increases
- The enthalpy remains unchanged
- The internal energy decreases
Q.14:- In which of the following, the entropy decreases ?
- Crystallization of sucrose from solution
- Rusting of Iron
- Melting of Ice
- Vaporization of camphor
Q.15:- The vertical lines in modern periodic table are called ?
Q.16:- The first attempt to classify elements was made by ?
Q.17:- A mixture of Benzene and Toluene forms ?
- An ideal solution
- Non-ideal solution
Q.18:- At high altitudes the boiling point of water lowers because ?
- Atmospheric pressure is low
- Atmospheric pressure is high
- Temperature is low
- None of these
Q.19:- The device which converts chemical energy of fuels directly into electrical energy is ?
- Concentration cell
- Galvanic cell
- Fuel cell
- Both (B) and (C)
Q.20:- The process of separating a crystalloid from a colloid by filtration is called ?
Q.21:- Butter is a colloid formed when ?
- Fat is dispersed in water
- Fat globules are dispersed in water
- Water is dispersed in fat
- Suspension of casein in water
Q.22:- Muddy water is treated with Alum in purification process, it is termed as ?
Q.23:- Fog is an example of colloidal system of ?
- Liquid in a gas
- Gas in a liquid
- Gas in a solid
- Solid in a liquid
Q.24:- The enzyme ptyalin used for digestion of food is present in ?
- Adrenal Gland
Q.25:- Heating of a ore below its melting point in the absence of air is known as ?