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Double salts are addition compounds which lose their identify in aqueous solution whereas complexes which are also addition compounds do not lose thei

Monjur Alahi

Double salts are addition compounds which lose their identify in aqueous solution whereas complexes which are also addition compounds do not lose their identify in aqueous solution. The coordination compounds show isomerism and find application in photography , qualitative analysis, metallurgy, water purification and in the treatment of various diseases.
Which of the following statement is incorrect ?
A. Alum is a double salt
B. EDTA salt of calcium is used in the treatment of lead poisoning
C. Effective atomic number of the metals in complexes `[Ni(CO)_(4)]` and `[Fe(CN)_(6)]^(4-)`
D. Chloridotris (triphenylphosphine) rhodium (I) is effective heterogeneous catalyst for hydrogenation of alkenes


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Salim Ahmed Kawsar

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Correct Answer - D
It is homogeneous catalyst for hydrogenation of alkenes.

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Find out the correct sentence. A) Double fertilization occurs in Angiosperms B) Double fertilization occurs in Gymnosperms

A) Double fertilization occurs in Angiosperms

2 Answers 1 views
a) Wild animals lose their habitat due to deforestation. b) 15 % of green house gases are released into

A) Both a & b are true, ‘b’ explains ‘a’

2 Answers 1 views
1. (a) Is ammonia more dense or less dense than air? (b) What property of ammonia is demonstrated by the Fountain Experiment? (c) Write the balanced equation for the reaction between ammonia and sulphuric acid. 2. Pick the odd member from the list giving reasons: (a) Ammonia, sulphur dioxide, hydrogen chloride, carbon dioxide. (b) Copper oxide, aluminium oxide, sodium oxide, magnesium oxide. 3. Give reasons for the following : (a) Liquid ammonia is used as a refrigerant in ice plants. (b) Aqueous solution of ammonia is used for removing grease stains from woollen clothes. (c) Aqueous solution of ammonia gives a pungent smell. (d) Aqueous solution of ammonia conducts electricity.

(1) (a) ammonia is less dense than air (b) solubility in water (c) 2NH3 + H2SO4 → (NH4)2SO4 (2) (a) Ammonia → because - NH3 is basic while, SO2,HCl and CO2 are acidic oxides. (b) CuO,...

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(a) ‘Risk’ means (i) miss (ii) lose (iii) endanger (iv) meet (b) Who is a patriot?  (c) What do the best soldiers do?

(a) (iii) endanger  (b) A patriot is a man who loves his country, works for it, and is willing to fight and die for it.  (c) The best soldiers risk their lives.  (d)...

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When an object is heated, the molecules that make up the object (a) begin to move faster (b) lose energy

(a) begin to move faster

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Assertion: Complexes of MX6 and MX5L type (X and L are unidentate) do not show geometrical isomerism.

(ii) Assertion and reason both are true but reason is not the correct explanation of assertion.

2 Answers 2 views
The two metals which are extracted by means of electrolytic reduction of their molten salts are:

Correct Answer - D Correct Answer - d

2 Answers 1 views
Which of the following complexes are chiral?

Correct answer is (a) 1 and 3

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Iron `(+II)` is one of the most important oxidation states, and salts are called ferrous salts. Most of `Fe(+II)` salts are pale green and contain `[F

Correct Answer - A Conceptual

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When a metal rod M is dipped into an aqueous colourless concentrated solution of compound N, the solution turns light blue. Addition of aqueous NaCl t

Correct Answer - B `underset((M))(Cu)+underset((N))(2AgNO_(3))rarrunderset(("Blue"))(Cu(NO_(3))_(2))+2Ag` `NaCl+underset(("remaining"))(AgNO_(3))rarrunderset((O))(AgCldarr)+NaNO_(3)` `2AgCl+2NH_(3)(aq)rarrunderset(("Soluble"))([Ag(NH_(3))_(2)]^(+))` `underset(("remaining"))(Cu(NO_(3))_(2))+4NH_(3)(aq)rarrunderset(("Deep blue colour"))([Cu(NH_(3))_(4)](NO_(3))_(2))`

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