Recent questions tagged class11

Aqueous solution of $Na_2O_3$ is

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A mixture of soda ash and pearl ash is known as

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$Li,Na$ and $K$ burn is excess of air to form

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$Na$ and $Li$ are burnt in dry air we get

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Oxone is a compound of

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Sodium amalgam is used as

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If the slopes of the line of regression of $y$ on $x$ and of $x$ on $y$ are $30^{\circ}$ and $60^{\circ}$ respectively. Then $ r(x,y)$ is

asked Jan 27, 2014 by thanvigandhi_1

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If the SD of X is $\sigma_X$ then SD of $\large\frac{aX-b}{c}$ ( where a,b,c are constants ) is:

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Alkali metals are

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The correlation between $x$ and $a-x$ is

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Which of the following does not give metal oxide on heating

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For $a$ series the value of mean deviation is 15. The most likely value of its quartile deviation is

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unpaired electrons $(e^-)$ are present in

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The median of the variables \[\] $x+4, x-\large\frac{7}{2},$$ x-\large\frac{5}{2},$$4 x-3, x-2$ \[\] $ x+\large\frac{1}{2}, x-\large\frac{1}{2}$$, x+5\: \: x > 0 $ is

asked Jan 27, 2014 by thanvigandhi_1

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Tetra ethyl lead is prepared by using an alloy

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A group of 10 items has arithmatic mean 6. If the arithmatic mean of 4 of these remaining item is 7.5 then the mean of the remaining item is

asked Jan 27, 2014 by thanvigandhi_1

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The measure which takes into account all the data item is

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The ashes of plants contain alkali-metals and 90% of which is

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Metal used in the detection of nitrogen in organic compound is

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The ratio of volume of the hydrogen liberated at S.T.P when equal amounts of tin reacts with dilute NaOH and conc NaOH.

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Which of the following is the correct order of chemical reactivity with water according to electrochemical series?

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The least basic oxide is

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Which one is highest melting point halide

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A mixture of $Al(OH)_3$ and $Fe(OH)_3$ can be separated by

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Which of the following salts does not form any precipitate with excess of $NaOH$?

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Which of the following alkali metals has the highest tendency for the half reaction? $M(g)\rightarrow M^+(g)+e^-$

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Which of the following has no reaction with water?

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When magnesium burns in steam,the formulae of the products are

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The alkaline earth metal that has greatest affinity for nitrogen is

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Anhydrone is a common name given to :

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Which of the following metal is used in the preparation of Grignard's reagent?

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Which of the following alkaline earth metal hydroxide is amphoteric in nature?

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Lime water contains

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The most basic oxide is

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Which of the following will have highest hydration energy?

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Which of the following fumes in moist air?

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Magnesium is present in

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The amphoteric alkaline earth metal oxide is

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The number of water molecules in hydrated beryllium salt never exceeds

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Electronic configuration in the valency shell of barium is

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The II group metal ion having $6s^2,6p^6$ as outer electron configuration is

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In the manufacture of caustic soda by castner keliner process.The products formed are

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The alkali metal needed for the growth of the plants is

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The metal used in solar cells is

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The least electro positive alkali metal is

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$Li$ shows diagonal relationship with

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Metal which emits photo electrons very easily is

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Chlorine can give highly ionic compound with

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The alkali metal with lowest melting point is

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The alkali metal widely used in photoelectric cells is

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