Jharkhand PECE Sample Questions
A. Two consecutive odd positive numbers such as a sum of whose squares is 290.
- 11,13
- 9,11
- 13,15
- 19,17
B. The value of K so that the following system of equations 3x - y + 5 = 0 and 6x - 2y + k = 0 has no solution.
- K is not equal to 1
- K is equal to 1
- K equal to 10
- K not equal to 10
C. which of the following cannot be the difference between a two-digit number and the number obtained after the interchange of digits?
- 72
- 36
- 54
- 48
D. 2 men and 7 boys can do a piece of work in 4 days. 4 men and 4 boys can do the same work in 3 days. Then the number of days a boy takes to complete the work will be -
- 55 days
- 60 days
- 0 days
- 55 days
E. The process of formation of covalent bonds with other atoms to form long chains is called -
- Addition
- Coordination
- Catenation
- Polymerization
F. Modern Period Law is based on -
- Atomic mass
- Mass number
- Atomic number
- Electronic configuration
G. The element is electropositive in nature -
- Sulpher
- Silicon
- Boron
- Copper
H. Reaction of marble into atmospheric humility and carbon dioxide to form slaked lime is an example of -
- Decomposition Reaction
- Combination Reaction
- Displacement Reaction
- Redox Reaction
I. Transparent Photographic Films gradually change their color when exposed to light due to -
- Combination Reaction
- Thermal Decomposition
- Oxidation Reaction
- Displacement Reaction
J. The colour of Phenolphthalein in an acidic medium is-
- Pink
- Yellow
- Colourless
- Orange
K. The element with a half-filled outermost electronic configuration -
- Aluminum
- Magnesium
- Boron
- Nitrogen
L. When IJ of work is done in moving a charge of 1 coulomb from one point to another point B in an electric circuit, then it refers to the following -
- 1-ampere current between points A and B.
- 1V of potential difference between two points A and B
- 1.6 * 10 to the power 19 columb of charge between two points A and B
- None of the above
M. The electric fuse is based on -
- The chemical effect of the current
- The magnetic effect of the current
- The healing effect of the current
- None of the above
N. To work properly, wind electric generators use wind speeds of at least about -
- 1.5 km/h
- 15 km/h
- 150 km/h
- 1500 km/h