P-II !SAS-24-II! M25
64.Which of the following statements regarding rusting of iron are true ?
(a)It involves a chemical reaction between iron and oxygen.
(b)It is an exothermic reaction.
(c)It can take place at room temperature.
(d)It is reversible reaction.
(1)(a), (b), (d)(2)(b) and (c) (3)(a) and (d) (4)(a), (b) and (c)
ÁŸêŸÁ‹Áπà ◊¥ ‚ ∑§ÊÒŸ ‚ ∑§ÕŸ ‹Ê„ ◊¥ ¡¥ª ‹ªŸ ∑§ ‚¥’¥œ ◊¥ ‚„Ë „Ò¥?
(a)ÿ„ ‹ÊÒ„ (‹Ê„) •ÊÒ⁄U •ÊÚĂˡŸ ∑§ ’Ëø ⁄UÊ‚ÊÿÁŸ∑§ •Á÷Á∑˝§ÿÊ ∑§Ê ‡ÊÊÁ◊‹ ∑§⁄UÃÊ „Ò–
(b)ÿ„ ∞∑§ ™§c◊ÊˇÊ¬Ë •Á÷Á∑˝§ÿÊ „Ò–
(c)ÿ„ ‚Ê◊Êãÿ Ãʬ (∑§Êc∆U-Ãʬ) ¬⁄U „Ê ‚∑§ÃÊ „Ò–
(d)ÿ„ ©à∑˝§◊áÊËÿ •Á÷Á∑˝§ÿÊ „Ò–
(1)(a), (b), (d)(2)(b) •ÊÒ⁄U (c) (3)(a) •ÊÒ⁄U (d) (4)(a), (b) •ÊÒ⁄U (c)
65.Match the substances in column A with their chemical names in column B.
(A) (B)
(a)Slaked lime (i)Calcium oxide
(b)Table salt (ii)Sodium bicarbonate
(c)Limestone (iii)Calcium carbonate
(d)Caustic soda(iv)Calcium hydroxide
(e)Quick lime (v)Sodium hydroxide
(f)Baking soda (vi)Sodium chloride
(1)(a)-(iv), (b)-(vi), (c)-(iii), (d)-(v), (e)-(i), (f)-(ii)
(2)(a)-(vi), (b)-(ii), (c)-(v), (d)-(i), (e)-(iii), (f)-(iv)
(3)(a)-(i), (b)-(vi), (c)-(iii), (d)-(v), (e)-(ii), (f)-(iv)
(4)(a)-(iv), (b)-(v), (c)-(iii), (d)-(ii), (e)-(i), (f)-(vi)
∑§ÊÚ‹◊ A ◊¥ ÁŒ∞ ª∞ ¬ŒÊÕÊZ ∑§Ê ∑§ÊÚ‹◊ B ◊¥ ÁŒ∞ ª∞ ©Ÿ∑§ ⁄UÊ‚ÊÿÁŸ∑§ ŸÊ◊Ê¥ ∑§ ‚ÊÕ ‚È◊‹ ∑§ËÁ¡∞ —
(A) (B)
(a)’ȤÊÊ øÍŸÊ(i)∑Ò§ÁÀ‚ÿ◊ •ÊÚÄ‚Êß«U
(b)‚ÊŒÊ Ÿ◊∑§(ii)‚ÊÁ«Uÿ◊ ’Êß∑§Ê’ʸŸ≈U
(c)øÍŸÊ ¬àÕ⁄U(iii)∑Ò§ÁÀ‚ÿ◊ ∑§Ê’ʸŸ≈U
(d)∑§ÊÚÁS≈U∑§ ‚Ê«UÊ(iv)∑Ò§ÁÀ‚ÿ◊ „Êß«˛UÊÄ‚Êß«U
(e)Á’ŸÊ’ȤÊÊ øÍŸÊ(v)‚ÊÁ«Uÿ◊ „Êß«˛UÊÄ‚Êß«U
(f)’Á∑¥§ª ‚Ê«UÊ (πÊŸÊ)(vi)‚ÊÁ«Uÿ◊ Ä‹Ê⁄UÊß«U
(1)(a)-(iv), (b)-(vi), (c)-(iii), (d)-(v), (e)-(i), (f)-(ii)
(2)(a)-(vi), (b)-(ii), (c)-(v), (d)-(i), (e)-(iii), (f)-(iv)
(3)(a)-(i), (b)-(vi), (c)-(iii), (d)-(v), (e)-(ii), (f)-(iv)
(4)(a)-(iv), (b)-(v), (c)-(iii), (d)-(ii), (e)-(i), (f)-(vi)