121- Ka values of some compound are given below, select the correct order of acidic strength:
i.H₂O = H⁺ + OH⁻ Ka=1x10⁻¹⁴
ii.ROH = RO⁻ + H⁺ Ka=1x10⁻¹⁸
iii.RCOOH = RCOO⁻ + H⁺ Ka=1x10⁻⁵
iv.C₆H₅OH = C₆H₅O⁻ + H⁺ Ka=1x10⁻¹⁰
A. ROH > H₂O > C₆H₅OH > RCOOH
B. C₆H₅OH > H₂O > ROH > RCOOH
C. RCOOH > C₆H₅OH > H₂O > ROH
D. RCOOH > ROH > C₆H₅OH > H₂O
View Answer
Answer : C. RCOOH > C₆H₅OH > H₂O > ROH
Description
122- The compound which cannot be hydrolyzed by water is:
A. CH₃-CH₂-C(O)-Br
B. CH₃-C(O)-O-C(O)-CH₃
C. CH₃-CH₂-C(O)-NH₂
D. None of the above
View Answer
Answer : D. None of the above
Description
123- KOH (alcoholic) + CH₃(CH₃)₂CH₂Br (1°), The reactants in the condition given will undergo:
A. Nucleophilic substitution reaction
B. Elimination reaction
C. Nucleophilic addition
D. None of the above
View Answer
Answer : B. Elimination reaction
Description
124- Phosphorus (white) catches fire in air and burns with the formation of white smoke the product formed is:
A. Phosphorus (iii) oxide
B. Phosphorus (v) oxide
C. Phosphorus (ii) oxide
D. Both (A) & (B)
View Answer
Answer : D. Both (A) & (B)
Description
125- Coordination number six complex having d²sp³ hybridization exist in:
A. Tetrahedral shape
B. Square planar shape
C. Trigonal bipyramidal shape
D. Octahedral shape
View Answer
Answer : D. Octahedral shape
Description
126- What type of hybridization is/are present in Hex-4-ene-1-yne:
A. Sp²
B. Sp
C. Sp and Sp²
D. Sp, Sp², Sp³
View Answer
Answer : D. Sp, Sp², Sp³
Description
127- In order to see various aspects of specimen a three dimensional image of the object can be produced using:
A. Compound microscope
B. Dark microscope
C. Transmission electron microscope
D. Scanning electron microscope
View Answer
Answer : D. Scanning electron microscope
Description
128- The usual position of the two centrioles in relation to each other is at right angle in:
A. Higher plant cells
B. Lower plant cells
C. Animals cells
D. Both (B) &(C)
View Answer
Answer : C. Animals cells
Description
129- In Saturated fatty acids more hydrogen are not accommodated because of:
A. Presence of single bonds between carbon atoms.
B. Presence of Double bonds between carbon atoms.
C. Absence of bond between carbon atoms.
D. All of these
View Answer
Answer : B. Presence of Double bonds between carbon atoms.
Description
130- A particle executes SHM along a straight line. Its amplitude is A. The potential energy of the particle is equal to the kinetic energy when the displacement of the particle from the mean position is:
A. Zero
B. ± A/2
C. ± A/√2
D. 2A
View Answer
Answer : C. ± A/√2
Description
131- In S.H.M, the fraction of kinetic energy to total energy when displacement is one-half of the Amplitude is?
A. 1/8
B. 1/2
C. 1/4
D. 3/4
View Answer
Answer : D. 3/4
Description
132- Laplace corrected Newton’s formula for the velocity of sound in gas because the sound propagates:
A. As longitudinal
B. Adiabatically
C. Isothermally
D. Under isobaric conditions
View Answer
Answer : B. Adiabatically
Description
133- Rhizobium belongs to:
A. Beta-protobacteria
B. Gama-protobacteria
C. Alpha-protobacteria
D. Delta-protobacteria
View Answer
Answer : C. Alpha-protobacteria
Description
134- Poisonous red-tides in coastal area are caused by the blooms?
A. Euglenoids
B. Rhodophyta
C. Diatoms
D. Dinoflagellates
View Answer
Answer : D. Dinoflagellates
Description
135- Two bodies are dropped from different heights h1 and h2. There ratio of the times taken by them to reach the ground will be:
A. h₁² : h₂²
B. h₁ : h₂
C. √h₁ : √h₂
D. None of the above
View Answer
Answer : C. √h₁ : √h₂
Description
136- A bullets of mass m moving with a velocity v is fired into a large wooden block of mass M. If the bullet remains embedded in the wooden block, the velocity of the system will be:
A. [M/(M+m)] v
B. [m/(M+m)] v
C. [M/(M-m)] v
D. [m/(M-m)] v
View Answer
Answer : B. [m/(M+m)] v
Description
137- A particle is moving with a constant speed a long a straight line. A force is NOT required to:
A. Increased speed
B. Decreased the momentum
C. Change the direction
D. Keep it moving with uniform velocity
View Answer
Answer : D. Keep it moving with uniform velocity
Description
138- He is grieving ______ his deceased father.
A. at
B. for
C. on
D. over
View Answer
Answer : B. for
Description
139- Which of the following atoms in the given oxidation state have the highest electro negativity.
A. Mo(ii)
B. Mo(iii)
C. Mo(v)
D. Mo(vi)
View Answer
Answer : D. Mo(vi)
Description
140- The existence of H₂²⁺ is not possible because?
A. It would be disproportion
B. It would be ratio active
C. It violates the pauli exclusion principle
D. No H-H bond would form
View Answer
Answer : C. It violates the pauli exclusion principle
