TNPSC Group I Exam-Previous Year Question Paper-Subject wise Analysed Questions-Science-Part 17
401. Consider
the following statements:
Assertion (A) :
A man inside an
artificial satellite feels weightless - ness.
Reason (R) : The
force of attraction due to the earth is equal to the centripetal force.
Selection the answer from the coding scheme given below:
A) (A)
is true, but (R) is false
B) (A)
is false, but (R) is true
C) Both
(A) and (R) are true and (R) is the correct explanation of (A)
D) Both
(A) and (R) are true but (R) is not the correct explanation (A)
Answer: (A)
402. Consider
the following statements:
Assertion
(A): In a pressure cooker the cooking is fast
Reason (R) : More
steam is available to cook the food at 100°C
Selection the answer
from the coding scheme given below:
A) (A)
is wrong but (R) is correct
B) (A)
is correct but (R) is wrong
C) Both
(A) and (R) are true and (R) is the correct explanation of (A)
D) Both
(A) and (R) are true but (R) is not the correct explanation (A)
Answer: (B)
403. Consider
the following statements:
Assertion (A) :
We see only one side
of the moon all time.
Reason (R) : Unlike
the earth, the moon does not rotate on its axis
Selection the answer
from the coding scheme given below:
A) (A)
is true, but (R) is false
B) (A)
is false, but (R) is true
C) Both
(A) and (R) are true but (R) is not the correct explanation of (A)
D) Both
(A) and (R) are false
Answer: (B)
404. Cinnamic
acid prepared by
A) Friedel
- Crafts’ reaction
B) Cannizzaro’s
reaction
C) Perkin’s
reaction
D) Clasisen’s
reaction
Answer: (C)
405. The number
of isomers in the aromatic compound with the formula C2H10
is
A) 2 B) 3
C) 4 D) 1
Answer: (A)
406. Trimethyl benzene is called
A) Pyrogallol B) Mesitylene
C) Catechol D) Mesityl oxide
Answer: (B)
407. Benzaldehyde
on treatment with chlorine in the absence of catalyst gives
A) Benzoyl
chloride
B) o-chlorobenzaldehyde
C) p-chlorobenzaldehyde
D) Chlorobenzene
Answer: (C)
408. Salicylic
acid is prepared by
A) Perkin’s
reaction
B) Kolbe’s
reaction
C) Reimer
-riemann reaction
D) Hofamann
reaction
Answer: (B)
409. The formula
of Plaster is
A) CaSO4
B) CaSO4,
H2O
C) CaSO4,
1/2 H2O
D) CaSO4,
2H2O
Answer: (C)
410. Tartar
emetic is
A) Potassium
bismuth nitrate
B) Potassium
tartrate
C) Antimony
tartrate
D) Potassium
antimonyl tartrate
Answer: (D)
411. The fourth
electron in an atom will have the four quantum number
n 1 m s
A) 2 0 0 -1/2
B) 1 0 0 +1/2
C) 2 1 0 +1/2
D) 1 1 1 +1/2
Answer: (C)
412. Mass number
of an element represents number of
A) protons
and neutrons
B) electrons
and neutrons
C) protons
and electrons
D) None
of these
Answer: (A)
413. Mohr’s salt
is
A) (NH4)
2, Fe(SO4) 2, 6H2O
B) (NH4)
, Fe(SO4) 2, 5H2O
C) (NH4)
2, Fe(SO4) 2, 24H2O
D) (NH4)
, Fe(SO4) 2, 6H2O
Answer: (A)
414. The
absorbent used in colour chromatographic method is
A) Silica
gel B) Benzene
C) Acetone D) Ether
Answer: (B)
415. The number
of orbital’s in f subshell energy level is
A) 3 B) 2
C) 5 D) 6
Answer: (D)
416. In the
periodic table, the elements present in the groups from
3
to 12 are known as
A) s-block B) p-block
C) d-block D) f-block
Answer: (C)
417. The effect
which represents the splitting of spectral line by external
magnetic
field is
A) Zeeman
effect
B) Stark
effect
C) Stark
effect
D) None
of these
Answer: (A)
418. Match
the following:
Molecule Shape
a) Ammonia 1. Linear
b) Water 2. Planar
c) Boron
trifluoride 3. V-shaped
d) Carbon
dioxide 4. Pyramid
Codes:
a b c d
A) 3 2 1 4
B) 3 1 4 2
C) 4 3 2 1
D) 1 2 3 4
Answer: (C)
419. Gemma cup is
present in
A) Riccia B) Marchantia
C) Anthoceros D) Furnaria
Answer: (A)
420. Which one is
correctly matched?
A) Black
gram - Tree
B) Teak
wood - Climber
C) Banana - Herb
D) Bengal
gram - Shrub
Answer: (D)
421. How many
types of cell divisions are there in plant cells?
A) 1 B) 2
C) 3 D) 4
Answer: (C)
422. Flowers emit
fragrance to
A) purify
air
B) drive
away flies
C) attract
insects
D) perform
all the above
Answer: (C)
423. Reduction in
chromosome number occurs after
A) Mitosis B) Amitosis
C) Meiosis D) Linkage
Answer: (C)
424. The male
cone of cycas consists
A) Microsporophylls
B) Megasporophylls
C) Microsporangia
D) Megasporangia
Answer: (C)
425. Botanical
name of paddy is
A) Triticum
Vulgare
B) Solanum
Nigrum
C) Oryza
Sativa
D) Eleusine
coracana
Answer: (C)
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