100 Science Questions and Answers for RRB NTPC
Methane an air pollutant is produced ___________
(A) by burning of coal in insufficient air
(B) by digestion of food by animals
(C) by action of ultraviolet light on nitrogenous compounds.
(D) as a by-product of manufacturing ammoniacal fertilizers
Correct Answer : B
How are 'anions' formed?
(A) Addition of electron
(B) Removal of electron
(C) Addition of proton
(D) Removal of proton
Correct Answer : A
Atomic number of which of the following elements is greater than that of Copper?
(A) Zinc
(B) Manganese
(C) Iron
(D) Chromium
Correct Answer : A
What is the common name of CaoCl2?
(A) Washing Soda
(B) Bleaching Powder
(C) Baking Powder
(D) Baking Soda
Correct Answer : B
Which energy is converted into electrical energy by a solar cell?
(A) Chemical Energy
(B) Nuclear energy
(C) Solar energy
(D) Magnetic energy
Correct Answer : C
Which of the following has the least melting point?
(A) Carbon
(B) Silver
(C) Mercury
(D) Gold
Correct Answer : C
In which state of matter, the distance between the molecules is minimum ?
(A) Solid
(B) Liquid
(C) Gas
(D) Plasma
Correct Answer : A
Which of the following gases turn lime water milky?
(A) Carbon Dioxide
(B) Oxygen
(C) Nitrogen
(D) Hydrogen
Correct Answer : A
The percentage of nitrogen present in ammonium sulphate is:
(A) $$ 30.5 \% $$
(B) $$ 18 \% $$
(C) $$ 21 \% $$
(D) $$ 25\% $$
Correct Answer : C
The stranger gas is also known as___________.
(A) Helium
(B) Argon
(C) Xenon
(D) Neon
Correct Answer : C
Showing page 5 of 10
enhttps://www.examsbook.com/100-science-questions-and-answers-for-ntpc/5105100-science-questions-and-answers-for-ntpcAbout author
Vikram Singh
Providing knowledgable questions of Reasoning and Aptitude for the competitive exams.
Read more articles