Jamb 2015 Flashcards
(22 cards)
The filter in the cigarette reduce the nicotine construct by
Absorption
Which of these require crystallization most? A. Drug making B. Cement making C. Paint making D. Perfume making
A
In the industrial production of H2 from water gas the CO2 produced along with the H2 is removed by
Washing under pressure
Vulcanization involve the removal of
Double bond
The acid in electrolysis of water is dilute
H2SO4
A suitable reagent to distinguish between alcohol and carboxylic acid is
NaHCO3
Which of the following metals burns with brick red A. Pb B. Ca C. Na D. Mg
B
Calcium is the only metal that burn with brick red flame. Option A,C,D will not burn with brick red flame rather burn with brick blue flame
In the production of soap, concentrated sodium chloride solution is added to
Decrease the solubility of the soap
Tartaric acid is used industrially to
Making baking powder
Which of the following ions requires the largest quantity of electricity for discharge at an electrode?
A. 2.0 mole of Q3+
B. 2.5 mole of R2+
C. 3.0 mole of T-
D. 4.0 mole of Y-
A
Hydrogen can be displaced from a hot alkaline solution by
Sn
A major source of oxide of nitrogen is from the burning of
Fuel
Which radioactive elements is commonly used as a nuclear fuel
Uranium
The energy value of petrol can be determined by
Fractionating column
NH3(g) + HCl(s) → NH 4Cl (s)
The entropy change in the system above is
Negative
Detergents are manufactured with straight hydrocarbon chains, is to make them
Biodegradable
Which of the following gives a precipitation when treated with NaOH Solution? A. AlCl3 B. NH4Cl C. Na2CO3 D. CH3COONa
A
What is used to remove impurities from pig iron
Oxygen
If glucose is heated with concentrated tetraoxosulphate(vi)acid, it will be dehydrated to?
Carbon
Chlorine gas turns damp starch-iodide paper
Dark blue
In the electrolysis of brine the anode and cathode is
Carbon and mercury
When steam is passed over red hot carbon the substances produced are
H2 and CO
