If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of hydrogen gas would be liberated?
Mg(s) + 2 HCl(aq) –> MgCl 2(aq) + H 2(g)
[ H = 1.0, Mg = 24.0 ]
- A. 0.54g
- B. 0.70g
- C. 1.08g
- D. 1.40g
The bleaching action of chlorine is through the process?
- A. Hydration
- B. Hydrolysis
- C. Reduction
- D. Oxidation
which of the following elements has the highest ionization energy?
- A. Calcium
- B. Chlorine
- C. Flourine
- D. Magnesium
Which of the following metals reacts slowly with cold water?
- A. Iron
- B. Silver
- C. Calcium
- D. Pottassium
A solid with higher melting and boiling points is likely to be?
- A. Covalent compound
- B. A Dative compound
- C. An Electrovalent compound
- D. A Non-metal
The periodic table is an arrangement of elements according to their?
- A. Oxidation number
- B. Atomic number
- C. Mass number
- D. Nunber of neutrons
To obtain pure carbon(ii)oxide from its mixture with carbon(iv)oxide, the mixture should be?
- A. Passed over heated copper(ii)oxide
- B. Bubbled through water
- C. Bubbled through conc H\(_2\)SO\(_4\)
- D. Bubbled through conc NAOH
The most important element on the earth’s crust is?
- A. Nitrogen
- B. Hydrogen
- C. Oxygen
- D. Fluorine
Aluminum hydroxide is used in the dyeing industry as a?
- A. Dye
- B. Dispersant
- C. Salt
- D. Mordant
An electron can be added to a halogen atom to form a halide ion with?
- A. 8 valence electrons
- B. 7 valence electrons
- C. 2 valence electrons
- D. 3 valence electrons
When a solid substance disappears completely as a gas on heating, the substance is said to have undergone?
- A. Sublimation
- B. Crystallization
- C. Distillation
- D. Evaporation
When cathode rays are deflected onto the electrode of an electrometer, the instrument becomes?
- A. Bipolar
- B. Negatively charged
- C. Positively charged
- D. Neutral
The general formula for the Alkanals is?
- A. R\(_2\)CO
- B. RCHO
- C. ROH
- D. RCOOR
Proteins in acid solution undergo?
- A. Substitution
- B. Fermentation
- C. Hydrolysis
- D. Polymerisation
What mass of water is produced when 8.0g of hydrogen reacts with excess oxygen?
- A. 8.0g
- B. 16.0g
- C. 36.0g
- D. 72.0g
The chlorinated alkane often used industrially to remove grease is?
- A. Tetrachloromethane
- B. Chloromethane
- C. Trichloromethane
- D. Dichloromethane
The substance often used for vulcanization of rubber is?
- A. Chlorine
- B. Hydrogen peroxide
- C. Sulphur
- D. Tetraoxosulphate(vi) acid
An organic compound that does not undergo a reaction with both hydrogen cyanide and hydroxylamine can be?
- A. Alkene
- B. Alkanal
- C. Alkanone
- D. Alkanoic Acid
Which of the following types of bonding does not involve the formation of new substances?
- A. Metallic
- B. Covalent
- C. Co-ordinate
- D. Electrovalent
What quantity of electricity will liberate 0.125 mole of oxygen molecules during the electrolysis of dilute sodium chloride solution?
- A. 24,125 C
- B. 48,250 C
- C. 72,375 C
- D. 96,500 C
A gaseous metallic chloride MCl consists of 20.22% of M by mass. The formula of the chloride is?
[ M = 27, Cl = 35.5]
- A. MCl
- B. MCl\(_2\)
- C. MCl\(_3\)
- D. M\(_2\)Cl\(_6\)