Chemistry

According to Charles’ law, the volume of a gas becomes zero at?

A. 0°C B. -100°C C. -273°C D. -373°C Correct Answer: Option C = -273°C

5 years ago

Which of the following factors will speed up the rate of evolution of carbon (iv) oxide in the reaction below?

2HCl + CaCO3 → CaCl2 + H2O + CO2 A. Increasing the concentration of the acid B. Increasing the surface…

5 years ago

The part of the total energy of a system that accounts for the useful work done in a system is known as?

A. Enthalpy change B. None of the above C. Gibb's free energy D. Entropy Correct Answer: Option C - Gibb's…

5 years ago

When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is

A. propylmethanoate B. ethylpropanoate C. methyl ethanoate D. methyl propanoate Correct Answer: Option D - methyl propanoate

5 years ago

How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?

A. none B. 6 C. 7 D. 8 Correct Answer: Option A - none Explanation Electrons are found in the…

5 years ago

The reaction 2H2S+SO2→3S+2H2O is

The reaction 2H2S+SO2→3S+2H2O is? A. not a redox reaction because there is no oxidant in the reaction B. not a…

5 years ago

How many alkoxyalkanes can be obtained from the molecular formula C4H10O?

C4H10O A. 4 B. 2 C. 1 D. 3 Correct Answer: Option D = 3 Explanation ethoxlethane methoxylpropane propoxylmethane

5 years ago

Hydrogen diffused through a porous plug?

A. thrice as fast as oxygen B. at the same speed as oxygen C. four times as fast as oxygen…

5 years ago

X is a substance which liberates CO2 on treatment with concentrated H2SO4. A warm solution of X can decolorize acidified KMnO4. X is?

A. HCOOH B. NaHCO3 C. FeCO3 D. H2C2O4 Correct Answer: Option D - H2C2O4 Explanation It should be noted that…

5 years ago