Chemistry

If the silver mirror test is positive; it indicates the presence of an?

A. alkyne B. alkanol C. alkanone D. alkanal Correct Answer: Option D - alkanal

5 years ago

The type of isomerism shown by cis- and trans- isomers is?

A. optical isomerism B. positional isomerism C. functional isomerism D. geometrical isomerism Correct Answer: Option D - geometrical isomerism

5 years ago

The most common ores of iron include?

A. haematite, malachite and limonite B. chalcolite, calamine and bornite C. magnetite, haematite and bornite D. magnetite, chalcolite and bornite…

5 years ago

Which of the following gives a precipitate when treated with NaOH solution?

A. AlCl3 B. NH4Cl C. Na2CO3 D. CH3COONa Correct Answer: Option A - AlCl3

5 years ago

Leads is used for making bullets and lead shots because of its?

A. resistance to corrosion B. low melting point C. high density D. flexibility Correct Answer: Option C - high density

5 years ago

Which of the following compounds of trioxonitrate (V) will decomposes to give dinitrogen (i) oxide and water when heated?

A. NaNO3 B. Zn(NO3)2 C. Cu(NO3)2 D. NH4NO3 Correct Answer: Option D - NH4NO3

5 years ago

The substance that is used in the steel industry for the removal of carbon; sulphur and phosphorus impurities from pig iron is?

A. oxygen B. chlorine C. nitrogen D. hydrogen Correct Answer: Option A - oxygen

5 years ago

The rate of a reaction usually decrease in the concentration of reactants because?

A. kinetic energy decrease B. temperature increase C. speed increases D. reactants collision decrease Correct Answer: Option D - reactants…

5 years ago

A catalyst speeds up the rate of chemical reaction by?

A. taking part in the reaction B. increasing the activation energy of the reaction C. lowering the activation energy of…

5 years ago