Question

27 A positively charged particle projected towards west is deflected towards north then the magnetic
field is
a. towards south
b. towards east
c. downward
d. upward
28. Pentane has the molecular formulae C5H12. It has
a. 5 covalent bonds
b. 12 covalent bonds
c. 16 covalent bonds
d. 17 covalent bonds
29. Which of the following produces maximum lather with soap solution
a. rain water
b. underground water
c. Distilled water to which some calcium sulphate has been dissolved
d. All produce the same amount of lather.
30. Which of the following correctly describes the magnetic field near a long straight wire?
a. The field consists of straight lines perpendicular to the wire.
b. The field consists of straight lines parallel to the wire.
c.The field consists of radial lines originating from the wire
d. The field consists of concentric circles centered on the wire.
31. The north pole of a long bar magnet was pushed slowly into a short solenoid connected to a
galvanomeler. The magnet was held slalionary for a few seconds with the north pole in the middle of
the solenoid and then withdrawn rapidly. The maximum deflection of the galvanometer was observed
when the magnet was:
a. moving towards the solenoid;
b. moving into solenoid;
c. at rest inside the solenoid;
d. moving out of the solenoid
2. Which of the following hydrocarbons undergo addition reaction ?
Q2H6, C2H4, C3H8 , C2H2 , CH4
a. CH4, C3H8
b. C2H2 , C2H6
c. C2H4, C2H6
d. C2H2, C2H4
33. Important conducting tissues in plants are:
a. Parenchyma & collenchymas
b. Arteries & veins
c. Xylem & phloem
d. Parenchyma & sclerenchyma
34. A wire of resistance R1 is cut into 5 equal pieces. The 5 pieces of wire are then connected in parallel.
If the resultant resistance of this combination is R2. Then, find R2/R1?
a. 1/25
b. 1/5
c.5
d. 25
35. How many structural isomers pentane have
a. 2
b.3
d. 5
36. Choose the correct path of urine in our body:
a. kidney - ureter- urethra - urinary bladder
b. kidney - urinary bladder - urethra - ureter
c. kidney-ureters - urinary bladder - urethra
d. None of the above​

Answer 1

Answer:

towards eastcovalents bonds

Answer 2

27. D

28. C

29. A

30. D

31. A

32. B

33. C

35. B

36. C

34.