GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 038

GENERAL SCIENCE CHEMISTRY ONE LINERS FOR TNPSC UPSC SSC SET 038

371). What is the colour of oxygen in solid state?
A). Pale yellow
B). Pale blue
C). Light green
D). Greenish yellow

Answer: Pale blue


   
372). An ionic compound when dissolved in water has produced mA^n+,nB^m−
ions. What is the formula of the compound?
A). AmBn
B). AnBm
C). AmBm
D). AnBn

Answer: AmBn

   
373). Which one of the following noble gases is not found in the atmosphere?
A). Argon
B). Krypton
C). Randon
D). Xenon

Answer: Randon

   
374). At 30∘C, which 3 metals are all liquids?
A). Hg, Fe, Zn
B). Hg, Sn, Pb
C). Zn, Pb, Sn
D). Hg, Ga, Cs

Answer: Hg, Ga, Cs


   
375). Which is iodised table salt?
A). An element
B). A compound
C). A heterogenous mixture
D). A homogenous mixture

Answer: A heterogenous mixture

 


376). At NTP, the least volume will be occupied by 15 kg of which one of the 
following?
A). NH3
B). O3
C). N2
D). Ne

Answer: O3



   
377). What is the reason for white cement to be white?
A). It does not contain carbon
B). It does not contain silicon
C). It does not contain iron
D). It does not contain calcium

Answer: It does not contain iron


   
378). Mildness of shaving cream is enriched by which one of the following?
A). Sodium silicate
B). Free fatty acid
C). Potassium carbonate
D). Sodium chloride

Answer: Sodium silicate


   
379). What is the weight of one atom of Hydrogen in grams?
A). 6.023×10^−23
B). 1.66×10^−24
C). 6.62×10^−24
D). None of these

Answer: 1.66×10^−24



   
380). Which one of the following elements shows variable equivalent mass?
A). Zinc
B). Silver
C). Calcium
D). Iron

Answer: Iron