How many isotopes has hydrogen?
2
3
4
5
Correct answer is B
No explanation has been provided for this answer.
Which of the following metals exists as liquid at ordinary temperature?
Copper
Gold
Mercury
Silver
Correct answer is C
No explanation has been provided for this answer.
Which of the following substances cannot be classified as a heavy chemical?
AgNO3
CaO
CaOCI2
H2SO4
Correct answer is A
No explanation has been provided for this answer.
The main function of limestone in the blast furnance is to
act as a reducing agent
act as a catalyst
remove impurities
supply carbon (IV) oxide
Correct answer is C
No explanation has been provided for this answer.
alkanol
alkanoate
alkane
alkanoic acid
Correct answer is A
No explanation has been provided for this answer.