91 Q) "Consider the following statements
I.A chalcogenide glass is a glass containing sulphur, selenium or tellurium.
II.Chalcogenide glass form the basis of re-writable CD and DVD solid-state memory technology.
Which of the statements given above is/are correct?"
(a)Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
92 Q) Match the Following
|
List 1
|
List II
|
|
(Elements)
|
(Colour
on flame)
|
|
A.
Barium
|
1.
Yellow
|
|
B.
Sodium
|
2.
Greenish
|
|
C.
Silver
|
3.
Turns black
|
|
D.
Lead Codes
|
4.
Apple green
|
(a) 2 4 3 1
(b) 2 3 4 1
(c) 4 3 1 2
(d) 4 1 3 2
93 Q) "Which of the following is correct for the semiconductor?
"
(a) A large gap between filled band and vacant band
(b) An impurity band present between filled band and vacant band.
(c) A small gap between filled band and vacant band.
(d) Filled band and vacant band overlap with one another
94 Q) Making of chappathi is based on
(a) Graham's law
(b) Henry's law
(c) Charles' law
(d) Boyle's law
95 Q) The hair dye available in the market contains two bottles, one containing dye and other containing hydrogen peroxide. The bottles are mixed before applying the dye. The function of hydrogen peroxide is
(a)to dilute the dye
(b)to oxidise the dye to give desired colour
(c)to reduce the dye to give desired colour
(d)to acidify the dye solution
96 Q) Which one of the following pairs of metals is present in the cytochrome-c and chlorophyll respectively?.
(a)Fe and Zn
(b)Mg and Mn
(c) Fe and Mg
(d)Mg and Zn
97 Q) "Consider the following statements
I. Rust is formed by the reaction of iron and oxygen in the presence of water or air moisture.
II. In salt water, iron tends to rust more quickly.
Which of the statements given above is/are correct?"
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
98 Q) The coil in a heater is made of
(a) nichrome
(b) tungsten
(c) copper
(d) iron
99 Q) " Assertion (A) Thorium is an efficient nuclear fuel widely used throughout the world.
Reason (R) India is richly endowed with thorium mineral."
(a)Both A and R are true and R is the correct explanation of A
(b)Both A and R are true but R is not the correct explanation of A
(c)A is true but R is false
(d)A is false but R is true
100 Q) From which one among the following water source, the water is likely to be contaminated with fluorine?
(a) Ground water
(b) Rain water
(c) River water
(d) Pond water
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