EASY
RPF Constable CBT 1
IMPORTANT
Earn 100

General formula of alkyne is _____

50% studentsanswered this correctly

Important Questions on Chemistry

MEDIUM
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 154
_____ allotrope, carbon atoms are arranged in the shape of a football. 
MEDIUM
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 155
_____ is used as a fuel in cars with petrol.
EASY
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 156
_____ has six carbon atoms and six hydrogen atoms. 
EASY
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 157
Which elements combine to form ammonia? 
EASY
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 158
Which one of the following involve a chemical reaction?
MEDIUM
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 159
Ethane (C2H6) on complete combustion gave CO2 and water. It shows that the results are in accordance with the law of conservation of mass. Then, the coefficient of oxygen is equal to _____.
EASY
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 160
A powdered salt (X) in a dry test tube was heated that evolves brown fumes of nitrogen dioxide and a yellow residue of lead oxide is also formed. The salt (X) is _____ 
EASY
RPF Constable CBT 1
IMPORTANT
Railway General Awareness Book>Chapter 49 - Chemistry>Practice Exercise>Q 161
A reddish brown colored metal used in electric wires, when powdered and heated strongly in an open China dish, its color turns black. When hydrogen gas is passed over this black substances, it regain its original color. Based on this information, the metal and black colored substances are _____ .