When start undergoes complete enzyme-catalyzed hydrolysis, the resulting product is

• A) glucose
• B) maltose
• C) sucrose
• D) fructose

Give one oxide in each case which;

(a) can act as a reducing agent

(b) can be used as a refrigerant

(c) is the anhydride of a strong acid;

(d) is yellow when hot and white then hot and white when cold;

(f) is usad as a pigment in paints.

At the same temperature and pressure, 50 cm3 of nitrogen gas contains the same number of molecules as?

• A. 25 cm³ of methane
• B. 40 cm³ of hydrogen
• C. 50 cm³ of ammonia
• D. 100 cm³ of chlorine

The periodic table is an arrangement of elements according to their?

• A. Oxidation number
• B. Atomic number
• C. Mass number
• D. Nunber of neutrons

Which of the following statements about catalyst is false?

• A) biological catalysts are called enzymes
• B) catalyst do not appear in the balanced equation
• C) catalyst reduce the activation energy for a reaction
• D) catalysts do not alter the mechanism of the reaction and never appear in the rate low

A compound that could be dried by using conc. tetraoxosulphate (VI) acid and not by calcium oxide is likely to be

• A. a deliquescent salt
• B. a neutral salt
• C. an alkaline gas
• D. an acid anhydride

Which of the following gases is not acidic?

• A. SO₃
• B. NO₂
• C. Co₂
• D. CO

When a substance is oxidized, it

• A. Loses electrons
• B. Gains oxygen atoms
• C. Gains electrons
• D. Loses protons (H+ ions)

When magnesium ribbon burns in air, the products are

• A. magnesium nitride and magnesium oxide
• B. magnesium nitride and carbon (ll) oxide
• C. magnesium oxide and steam
• D. magnesium nitride and soot

How many mole of AgNO₃are there in 500cm³of 0.01MAgNO₃solution?

• A. 0.005 mole
• B. 0.05 mole
• C. 0.5 mole
• D. 5 moles