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25.	Water is a good solvent of ionic salts because
	A.  It has a high boiling point
	B.  It has no colour
	C.  It has a high specific heat
	D.  It has a high dipole moment

Answer

Ans: D It has a high dipole moment

26.	A substance which changes readily into vapour without heating is called
	A.  Synthetic
	B.  Volatile
	C.  Efflorescent
	D.  Effervescent

Answer

Ans: B Volatile

27.	In an electronic watch, the component corresponding to pendulum of a pendulum clock is a
	A.  Diode
	B.  Transistor
	C.  Crystal oscillator
	D.  Balance wheel

Answer

Ans: C Crystal oscillator

28.	The temperature, at which the same value on both the centigrade and the Fahrenheit scale exists, is
	A.  40°
	B.  -40 °
	C.  32 °
	D.  –32 °

Answer

Ans: B - 40 °