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Home » Medical Papers » Aptitude Test - 18
Hassan
1.‘Ka’ for an acid is higher, the stronger is the acid; relate the strength an acid with ‘pKa’
A. Higher pKa, weaker the acid
B. Lower pKa, stronger the acid
C. pKa has no relation with acid strength
D. Higher pKa, weaker the acid
2.It is experimentally found that a catalyst is used to:
A. Lower the activation energy
B. Increase the activation energy
C. Lower the pH
D. Lower the activation energy
3.If ‘V’ is applied potential difference across a resistance ‘R’, then loss in potential energy per unit time is
A. VI
B. I2 R
C. V2 /R
D. VI
4.According to collision theory of bimolecular reaction sin gas phase, the minimum amount of energy required for an effective collision is known as:
A. Heat of reaction
B. Rate of reaction
C. Has no effect on the reaction
D. Heat of reaction
5.The substances like germanium and silicon have
A. Negative temperature coefficients
B. Positive temperature coefficients
C. Both A and B
D. Negative temperature coefficients
6.The sensitivity of a galvanometer can be decreased by
A. Increasing magnetic field
B. Increasing number of turns of the coil
C. Increasing c BAN Ration
D. Increasing magnetic field
7.When elements of group II-A (alkaline earth metals) are exposed to air, they quickly become coated with a layer of oxide. What is the purpose of this oxide layer?
A. The oxide layer exposes the metal to Atmospheric attack
B. The oxide layer increases the reactivity of metal
C. The oxide layer protects the metal from further atmospheric attack
D. The oxide layer exposes the metal to Atmospheric attack
8.Force on a current carrying conductor in a uniform magnetic field is
A. F = NIA cos α
B. F = μnI
C. F = ILB sin α
D. F = NIA cos α
9.In silicon dioxide each silicon atom is tetrahedrally bonded to four oxygen atoms and each oxygen atom is bonded to two silicon atoms. The ratio of silicon to oxygen atoms is:
A. 2:2
B. 1:2
C. 2:1
D. 2:2
10.Hydrogenation of unsaturated oils is done by using:
A. Finally divided nickel
B. Finally divided iron
C. Vanadium pentaoxide
D. Finally divided nickel
11.In an electrochemical series, standard electrode potentials are arranged on the basis of:
A. pH scale
B. pOH scale
C. Hydrogen Scale
D. pH scale
12.Pick the correct statement:
A. Chelates are usually more stable than ordinary
B. Ordinary complexes are more stable than chelates
C. Monodentate ligands form the chelates complexes
D. Chelates are usually more stable than ordinary
13.The reaction which is responsible for the production of electricity in the Voltaic cell is:
A. Hydrolysis reaction
B. Oxidation reaction
C. Redox reaction
D. Hydrolysis reaction
14.In contact process, the catalyst used for the conversion of Sulphur dioxide to Sulphur trioxide is:
A. Magnesium oxide
B. Aluminum oxide
C. Silicon dioxide
D. Magnesium oxide
15.The unpolluted natural rain water is slightly acidic due to the reaction of rain water with:
A. Sulphur dioxide
B. Oxides of nitrogen
C. Carbon dioxide
D. Sulphur dioxide
16.Glucose is converted into ethanol by the enzyme _______ present in yeast:
A. Urease
B. Invertase
C. Sucrase
D. Urease
17.The rate of reaction involving ions can be studied by __________ method
A. Dilatometric
B. Refractometric
C. Optical rotation
D. Dilatometric
18.In the Haber's process for the manufacturing of ammonia, nitrogen is taken from:
A. Proteins occurring in living bodies
B. Ammonium salts obtained industrially
C. Air
D. Proteins occurring in living bodies
19.When one mole of gaseous hydrogen ions are dissolved in water to form an infinitely dilute solution, the amount of heat liberated is
A. -1891 kJmol-1
B. -1075 kJmol-1
C. -499 kJmol-1
D. -1891 kJmol-1
20.In comparison with oxygen gas, a strong triple bond is present between two nitrogen atoms in a molecule and therefore nitrogen gas is:
A. Highly reactive gas
B. Completely inert like noble gases
C. Very less reactive gas
D. Highly reactive gas
21.Energy required to remove an electron from the outermost shell of its isolated gaseous atom in the ground state is
A. Electron affinity
B. Lattice energy
C. Ionization energy
D. Electron affinity
22.The compound with an atom, which has unshared pair of electrons is called:
A. Nucleophile
B. Electrophile
C. Protophile
D. Nucleophile
23.1-chloropropane and 2-chlorpropane are isomers of each other, the type of isomerism in these two is called:
A. Cis-trans isomerism
B. Chain isomerism
C. Position isomerism
D. Cis-trans isomerism
24.Which of the following carbonates of alkali metals is not stable towards heat and is decomposed on heating to its oxide along with liberation of CO2?
A. Li2CO3
B. Mg2CO3
C. K2CO3
D. Li2CO3
25.Benzene in the presence of AlCl3 produces acetophenone when reacts with:
A. Acetyl chloride
B. Acetic acid
C. Ethyl benzene
D. Acetyl chloride
26.The presence of calcium is essential for the normal development of plants. An adequate supply of calcium appears to stimulate the development of which part of the plants?
A. Leaves
B. Fruits
C. Root hairs
D. Leaves
27.Which of the following sulphates is not soluble in water?
A. Sodium Sulphate
B. Barium Sulphate
C. Potassium Sulphate
D. Sodium Sulphate
28.The trend in the densities of elements of Group III-A of the Periodic Table is
A. A gradual increase
B. A gradual decrease
C. First decrease then increase
D. A gradual increase
29.White lead has one of the following properties
A. Acidic
B. Crystalline
C. Amorphous
D. Acidic
30.The strongest acid among the following is
A. HF
B. HI
C. HCl
D. HF
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