The heat required to raise the temperature of body by 1K is called
A. Specific heat
B. Thermal capacity
C. Water equivalent
D. None of the above Answer
The Latin word ‘Formica’ means ant. The name formic acid is derived from this Latin word because
A. This acid, in ancient times, was used to eliminate ant-hills
B. This corrosive acid is secreted by ants to drive away their enemies
C. This acid was first obtained by the distillation of ants
D. Ants are attracted by the odour of this acid
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
A. 1.568 × 103
B. 6.023 × 1019
C. 4.84 × 1017
D. 6.023 × 10²³
The mass number of a nucleus is
A. Always less than its atomic number
B. The sum of the number of protons and neutrons present in the nucleus
C. Always more than the atomic weight
D. A fraction
The method that cannot be used for removing permanent hardness of water is
A. Adding sodium carbonate
B. Distillation
C. Adding caustic soda
D. Boiling
The elements of a VIIIA group are known as
A. Lanthanides
B. Actinides
C. Halogens
D. Nobel gases
Which one of the following decreases along the period?
A. Ionization energy
B. Atomic radius
C. Electronegativity
D. Electron affinity
4th and 5th period in periodic table are known as
A. Short period
B. Long period
C. Normal leriod
D. Very long period
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