Methyl alcohol is not used as___________________?
A. a solvent B. an anti freezing agent C. a substitute for petrol D. for denaturing of ethyl alcohol
Chemistry MCQs
Oxygen (molecular weight = 32) diffuses at a rate of 10cm3/min under the same conditions of temperature and pressure how fast will hydrogen (molecular weight = 2) diffuse ?
A. 20cm3/min B. 40cm3/min C. 160cm3/min D. 2.5cm3/min
As a substance moves from a solid to a liquid all of the following changes occur except ?
A. molecules become more disordered. B. K.E of the molecules decreases C. intermolecular forces become weaker. D. molecules move more frequently.
The rectified spirit is________________?
A. 12% alcohol B. 90% alcohol C. 95% alcohol D. 100% alcohol
Which of the following solids show anisotropy___________________?
A. Plastic B. Glass C. Rubber D. None of the above
Butyl chloride gives possible isomers ?
A. 2 B. 3 C. 4 D. 5
Metallic crystals are soluble in________________?
A. Polar solvent B. Non polar solvent C. Fused metal D. None
Paramagnetic behaviour of substance is measured by a balance called___________________?
A. Analytical balance B. Guoys balance C. Electrical balance D. Single beam balance
Which of the following properties prove that cathode rays are material in nature_________________?
A. they cast shadow B. they possess momentum C. they are negatively charged D. all of the above
When an electron is moving with velocity of 2.188 x 106 ms-1 in the first orbit of Bohrs model of hydrogen. The de Broglie wavelength of electron is______________?
A. 0.33 nm B. 0.34 nm C. 0.35 nm D. 0.36 nm