121. Calcium sulphate is known as_____?
A: Gypsum salt
B: Epsom salt
C: Blue vitriol
D: Potash alum
122. Which of the following minerals is most resistant to chemical weathering :
A. Olivine
B. Quartz
C. Hornblends
D. Potassium Feldspar
123. An igneous rock contains a radioactive isotope that has a half-life of 10 million years. Careful analysis shows that only one quarter of the original concentration of the parent isotope is left. How old is this igneous rock?
A. 10 Million years
B. 20 Million Years
C. 30 Million Years
D. 40 Million Years
124. The discipline which deals with understanding and treatment of mental health is called :
A. Applied psychology
B. Clinical Psychology
C. Psychoanalysis
D. Psychiatry
125. Overcooking of food should be avoided because overcooking :
A. Makes the food difficult to digest
B. Makes the food toxic
C. Increases the nutritive value of food
D. Reduces the nutritive value of food
126. Optical fibre operates on the principle of :
A. Tyndall effect
B. Photoelectric effect
C. Laser technology
D. Total internal reflection
127. The sensation of the skin is perceived by :
A. Epidermis
B. The dermis
C. Endodermis
D. None of the above
128. The loudness of sound depends on its :
A. Wavelength
B. Frequency
C. Amplitude
D. ALL of the above
129. A person standing in front of a mirror finds his image smaller than him and erect. This implies that the mirror is :
A. Plane
B. Concave
C. Convex
D. Not of good quality
130. The densities of three liquids are D, 2D, 3D. What will be the density of the resulting mixture if equal volumes of the three liquids are mixed?
A. 4D
B. 2D
C. 3D
D. 6D
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