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Recent questions tagged s-block-elements

When Sodium Chloride is dissolved in water, the sodium ion is:

asked Mar 16, 2014 by balaji.thirumalai

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A burning strip of Magnesium is introduced into a jar containing a gas. After sometime the walls of the container are coated with carbon. The gas in the container is:

asked Mar 15, 2014 by balaji.thirumalai

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Which of the following presents the correct sequence of increasing basic nature of given oxides?

asked Mar 15, 2014 by balaji.thirumalai

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Calcium oxide can be used for drying of

asked Jan 29, 2014 by sreemathi.v

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The thermal stability of $BaCO_3,CaCO_3$ and $MgCO_3$ is

asked Jan 29, 2014 by sreemathi.v

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Metals used in flash photography is

asked Jan 29, 2014 by sreemathi.v

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Gypsum is not chemically similar to

asked Jan 29, 2014 by sreemathi.v

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Alkaline earth metal(s) which does(do) not impact colour to the flame is(are)

asked Jan 29, 2014 by sreemathi.v

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Halides (Cl,Br and I) of alkaline earth metal which cannot be dehydrated by heating is (are)

asked Jan 29, 2014 by sreemathi.v

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Oxalates of alkaline earth metal(s) sparingly soluble in water (is) are

asked Jan 29, 2014 by sreemathi.v

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Alkaline earth metal sulphates which crystallises in hydrated form are

asked Jan 29, 2014 by sreemathi.v

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Slaked lime is obtained when water is added to

asked Jan 29, 2014 by sreemathi.v

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The compound insoluble in acetic acid is :

asked Jan 29, 2014 by sreemathi.v

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The pair of amphoteric hydroxides is :

asked Jan 29, 2014 by sreemathi.v

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Yellow phosphorous on reaction with $Ca(OH)_2$ gives

asked Jan 28, 2014 by sreemathi.v

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Which of the following is the strongest reducing agent?

asked Jan 28, 2014 by sreemathi.v

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The most active metal is

asked Jan 28, 2014 by sreemathi.v

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Portland cement does not contain :

asked Jan 28, 2014 by sreemathi.v

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Non metals present in borax are

asked Jan 28, 2014 by sreemathi.v

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The alkali metal used as coolant in nuclear reactors is

asked Jan 28, 2014 by sreemathi.v

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Glauber salt is a

asked Jan 28, 2014 by sreemathi.v

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Pearl ash is

asked Jan 28, 2014 by sreemathi.v

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Which among the compounds of alkali metals undergo hydrolysis

asked Jan 28, 2014 by sreemathi.v

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The alkali metal bi carbonate that has no existance in solid state is

asked Jan 28, 2014 by sreemathi.v

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Tincal contains mainly

asked Jan 28, 2014 by sreemathi.v

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What is the formula of calgon?

asked Jan 28, 2014 by sreemathi.v

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Which of the following is best $CO_2$ absorber as well as source of $O_2$ in space capsule?

asked Jan 28, 2014 by sreemathi.v

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

asked Jan 28, 2014 by sreemathi.v

1 answer

Considering greater polarization in lid compared to that in NaCl,which of the following statements you would expect to be wrong?

asked Jan 28, 2014 by sreemathi.v

1 answer

In castner-kellner cell used for the manufacture of NaOH,the cathode in the central compartment is made up of

asked Jan 28, 2014 by sreemathi.v

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The salt used for performing bead test in inorganic qualitative analysis is

asked Jan 28, 2014 by sreemathi.v

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Four alkali metals A,B,C and D are having standard electrode potentials as -3.05,-1.66,-0.40 and 0.80v respectively,which one will be the most reducing agent?

asked Jan 28, 2014 by sreemathi.v

1 answer

$CO+NaOH\rightarrow $?

asked Jan 28, 2014 by sreemathi.v

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The metal which gives brick red colour in flame test is

asked Jan 28, 2014 by sreemathi.v

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Oxides of alkaline earth metals are stable due to

asked Jan 28, 2014 by sreemathi.v

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The salt which gives crimson red colour in flame test is

asked Jan 28, 2014 by sreemathi.v

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Which of the following metals cannot give flame tests?

asked Jan 28, 2014 by sreemathi.v

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The electrical conductivity in aqueous solutions is high for

asked Jan 28, 2014 by sreemathi.v

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Which does not form peroxides?

asked Jan 28, 2014 by sreemathi.v

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Magnesium burns in air giving two products .Their formulae are

asked Jan 28, 2014 by sreemathi.v

1 answer

Oxygen evolves on heating

asked Jan 28, 2014 by sreemathi.v

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$BeH_2$ and $MgH_2$ are prepared using the reagent

asked Jan 28, 2014 by sreemathi.v

1 answer

The elements that reacts with cold water

asked Jan 28, 2014 by sreemathi.v

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The polorising power of $Mg^{2+}$ is nearly same as that of

asked Jan 28, 2014 by sreemathi.v

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Which of the following is less covalent?

asked Jan 28, 2014 by sreemathi.v

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Hardening of plaster of paris is because of

asked Jan 28, 2014 by sreemathi.v

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In the hardening stage of plaster of paris,the compound formed is

asked Jan 28, 2014 by sreemathi.v

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Passivity is exhibited by

asked Jan 28, 2014 by sreemathi.v

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Which of the following is an alkaline earth?

asked Jan 28, 2014 by sreemathi.v

1 answer

The metal carbonate which decomposes easily on heating is

asked Jan 28, 2014 by sreemathi.v

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