731. Fehling’s test and Tollen’s test are used for the identification of?
(A) Ketones
B. Aldehydes
(C) Alcohols
(D) Carboxylic Acid
732. Among the following, all are waterborne diseases except?
(A) Typhoid
(B) Polio
(C) Cholera
D. AIDS
733. In a dry cell, the electrolyte is a moist paste of?
(A) NaCl and CuCl2
B. NH4Cl and ZnCl2
(C) Both of the above
(D) None of the above
734. Glacial acetic acid is miscible with?
A. Water
(B) Alcohol
(C) Ether
(D) All of the above
735. Which compound is slightly soluble in water?
(A) NaCl
(B) NH4Cl
(C) CaCl2
D. AgCl
736. NaOH contains the following oxygen percentage:
A. 40
B. 60
C. 8
D. 10
737. What quantity of limestone (CaCO3) on heating will give 56 kg of CaO?
A. 1000 kg
B. 56 kg
C. 44 kg
D. 100 kg
738. Which of the following has the least mass?
A. 2 gram atom of nitrogen
B. The C atom is 3 * 10(23)
C. 1 mole of S
D. 7.0 gr of Ag
739. 1 mole CH4 contains:
A. 6.02 * 10(23) atoms of H
B. 4g-atom of Hydrogen
C. 1.81*10(23) molecules of CH4
D. 3 grams of Carbon
740. How many moles of Helium gas occupy 22.4 L AT 0 degree centigrade at 1 atm. pressure?
A. 0.11
B. 0.90
C. 1.0
D. 1.11
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