Question

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Aired
ction-A
Q.1 Balance the given equation and also write the type of chemical reaction
represented by it. BaCl2 + Al2(SO4)3 ---->AlCl3
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LAOR
Write balanced chemical equation with
state symbols for
the given
reaction: Solution of Barium chloride and sodium sulphate (in water) to form
insoluble barium sulphate and solution of sodium chloride.
Q.2 Blue litmus solution is added to two test tubes A and B containing HCl and
NaOH solution respectively. In which test tube a colour change will be observed?
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Q.3 Chemical formulae of methane and ethane are:
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eae Ho and C3H6
b. CH4 and Cz H6
C. CH3 and C2 H6
d. C2 H4 and C2 H6
Q.4 Why is the colour of sky blue?
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8.5 Power of a lens is - 4.5. What will be its focal length? 7
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Q.6 What is Snell's law?
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OR
Define magnification produced by a lens?
Q.7 What is the function of galvanometer in a circuit? Treasure amount of wisy
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Q.8 Name the rule to determine the direction of force experienced by a current
carrying straight conductor placed in a uniform magnetic field which is
perpendicular to it.
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2.9 Three resistors of resistances R1, R2 and R3 are connected in parallel. Write
expressions for the equivalent resistance of the combination.
01
OR
Three resistors of resistances 22 each are connected in parallel. Find the
equivalent resistance of the combination.
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