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Hassan
1.Which one of the following will have the smallest radius?
A. Al+3
B. Si+4
C. Mg+2
D. Al+3
2.Keeping in view the size of atoms, which order is correct?
A. N > C
B. P > Si
C. Ar > Cl
D. N > C
3.Which one of the following gases is used as mixture for breathing by sea divers?
A. Oxygen and Nitrogen
B. Nitrogen and Helium
C. Helium and Oxygen
D. Oxygen and Nitrogen
4.[Ti(H2O)6]+3 transmits
A. Yellow and Red light
B. Yellow and Blue light
C. Red and white light
D. Yellow and Red light
5.Electronic configuration of Gold [Au79] is
A. [Xe] 4f14, 5d10, 6s1
B. [Xe] 4f10, 5d10, 6s2
C. [Xe] 4f14, 5d9, 6s2
D. [Xe] 4f14, 5d10, 6s1
6.Electronic configuration of Gold [Au79] is
A. [Xe] 4f14, 5d10, 6s1
B. [Xe] 4f10, 5d10, 6s2
C. [Xe] 4f14, 5d9, 6s2
D. [Xe] 4f14, 5d10, 6s1
7.About 80% of ammonia is used for the production of
A. Explosives
B. Fertilizers
C. Nylon
D. Explosives
8.Urea is the most widely used nitrogen fertilizer in Pakistan. Its composition Is
A. NH2CO
B. N2H5CO2
C. N2H4CO2
D. NH2CO
9.What is the percentage of nitrogen in NH3NO3?
A. 65%
B. 35%
C. 20%
D. 65%
10.Which one of the following is a powerful electrophile used to attack on the electrons of benzene ring?
A. FeCl2
B. FeCl4 –
C. Cl+
D. FeCl2
11.Order of reactivity of alkenes with hydrogen halide is:
A. HBr > HI > HCl
B. HI > HBr > HF
C. HF > HI > HCl
D. HBr > HI > HCl
12.Which one of the following was used as one of the earliest antiseptic and disinfectant?
A. Phenol
B. Ether
C. Ethanol
D. Phenol
13.Which one of the following is NOT able to denature the ethanol?
A. Methanol
B. Lactic acid
C. Pyridine
D. Methanol
14.How will you distinguish between methanol and ethanol?
A. By Lucas test
B. By silver mirror test
C. By oxidation
D. By Lucas test
15.To produce absolute alcohol (100%) from rectified spirit (95.6% alcohol), the remaining 4.4% water must be removed by a drying agent such as
A. Calcium oxide
B. Calcium chloride
C. Calcium carbonate
D. Calcium oxide
16.Which one of the following is also called silver mirror test?
A. Fehling’s solution test
B. Iodoform test
C. Tollen’s reagent
D. Fehling’s solution test
17.Both aldehydes and ketones are planer to the neighborhoods of carbonyl (C=O) group. Which one of the following bonds is distorted towards the oxygen atoms?
A. π-bond of C and O
B. Sigma bond of C and H
C. Sigma bond of C and O
D. π-bond of C and O
18.The specific substances (metabolite) that fits on the enzyme surface and is converted to products is called
A. Co-factor
B. Prosthetic group
C. Isoenzyme
D. Co-factor
19.Polymide is formed due to the condensation od hexane-dioic acid with
A. Hexane-1,5-diamine
B. Hexane-1,6-diamine
C. Hexane-1,4-diamine
D. Hexane-1,5-diamine
20.Haemoglobin is a
A. Genetic protein
B. Building protein
C. Transport protein
D. Genetic protein
21.Out of these which nitrogen base is NOT present in DNA?
A. Adenine
B. Guanine
C. Uracil
D. Adenine
22.Which one of the following is an example of co-polymer?
A. Polyamide
B. Polystyrene
C. Polyvinyl acetate
D. Polyamide
23.The biggest source of acid rain is the oxide of
A. N
B. S
C. O
D. N
24.Burning of which one of the following waste is considered as useful industrial fuel or to produce electricity
A. Metals
B. Grass
C. Paper
D. Metals
25.Standard enthalpy of combustion of graphite at 25 oC is –393.51 kJ mol-1 and that of diamond is –395.41 kJ mol-1. The enthalpy change for graphite is:
A. – 1.91
B. +2.1
C. –2.1
D. – 1.91
26.10.0 grams of glucose are dissolved in water to make 100 cm3 of its solution, its molarity is:
A. 0.55
B. 0.1
C. 10
D. 0.55
27.Given solution contains 16.0 g of CH3OH, 92.0 g of C2H5OH and 36 g of water. Which statement about mole fraction of the components is true?
A. Mole fraction of CH3OH is highest among all
B. Mole fraction of C2H5OH and H2O is the same
C. Mole fraction of CH3OH and C2H5OH is same components
D. Mole fraction of CH3OH is highest among all
28.In spite of all the torture, the police has failed to _________ any confession from the thief.
A. Convince
B. Elicit
C. Refuse
D. Convince
29.It is the duty of a teacher to _________ moral values in his students besides teaching.
A. Tell
B. Record
C. Inculcate
D. Tell
30.Many of the houses in Murree have basic __________.
A. Amenities
B. Accuracy
C. Affinity
D. Amenities
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