`Na_(2)CO_(3),NaCl, NaNO_(2),Na_(2)SO_(3),NaBr,CH_(3)CO O Na` are separately treated with `AgNO_(3)` solution. In how many cases white precipitate is/are obtained.
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In reaction `CaF_(2)+H_(2)SO_(4)rarrCaSO_(4)+2HF` 6kg of `CaF_(2)` are treated with an excess of `H_(2)SO_(4)` and yield 2.0kg of HF. Percentage yield
`n_(HF)=0.1` `n_(CaF_(2))"used"=(0.1)/(2)` `w_(CaF_(2))"used"=3.9kg` `% "yiled"=(3.9)/(6)xx100=65%`
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Amongest the following, the total number of compounds whose aqueous solution turns red litmus paper into blue is- `NaCl,Na_(2)SO_(4),CH_(3)COONa,(NH_(
Aqueous solution which are basic in nature- `CH_(3)COOna, Na_(3)PO_(4),NaOH,K_(2)CO_(3)`
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A speaks truth in 80% cases and B speaks truth in 90% cases. In what percentage of cases are they likely to agree with each other in stating the same
`P(A) =(80)/(100)=(4)/(5), P(B)=(90)/(100)=(9)/(10)` P(Agree)=P(Both speaking truth or both telling lie) `=P(AB or barAbar B)` ` P(A)P(B)or P(barA)P(barB)` `=(4)/(5)(9)/(10)+(1)/(5)(1)/(10)` `=(36+1)/(50)=(37)/(50)` `=(74)/(100)=74%`
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Write the IUP AC name of the following compound : `CH_(3)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-underset(Cl)underset(|)CH-CH_(3)`
3-Chloro, 2-dimethylbutane.
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Rearrange the following compounds in the increasing order of their boiling points : `CH_(3)-CHO,CH_(3)-CH_(2)-OH,CH_(3)-CH_(2)-CH_(3)`
`CH_(3)-CH_(2)-CH_(3)ltCH_(3)-CHOltCH_(3)-CH_(2)-OH`
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Write he IUPAC name of the following compound: `CH_(3)-O-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(3)`
`CH_(3)-O-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-CH_(3) ` IUPAC name: 2-methoxy-2-methylpropane.
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How many anions evolve brownish gas when treated with dil. /con. HCl ? `(i) CO_(3)^(2-) " " (ii)SO_(3)^(2-) " " (iii) NO_(2)^(-) " " (iv)Cl^(-)` `(v)
Correct Answer - 1 (only iii)
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How many of the following compounds are possible products when chlorine is passed through hypo solution (i) S (ii) HCl (iii) `Na_(2)S` (iv) `Na_(2)SO_
Correct Answer - 3(i, ii and iv)
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Write the product of following reactions `(a) CH_3-CH_(2)-OH overset(I_(2)//KOH)to "" Ph-CH_(2)-CO-CH_(3)overset(I_(2)//KOH)to` (c) CH_(3)-underset(OH
Correct Answer - (a)`CHI_(3)+HCOO^(Theta)K^(o+) " " (b) CHI_(3)+PhCH_(2)COO^(Theta)K^(o+) " " (c) CHI_(3)+Ph-COOK`
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निम्नलिखित यौगिकों के आईयूपीएसी (IUPAC) नामपद्धति में नाम लिखिए `{:("(i) "CH_(3)CH(CH_(3))CH_(2)CH_(2)CHO," (ii) "CH_(3)CH_(2)COCH(C_(2)H_(5))CH_(2)CH
Correct Answer - (i) 4-मेथिपेंटल `" "` (ii) 6-क्लोरो-4-एथिलहेक्सेन-3-ओन (iii) ब्यूट-2-इनैल `" "` (iv) पेन्टेन2-4-डाईओन (v) 3,3,5-ट्राइमेथिलहेक्सेन-2-ओन `" "` (vi) 3,3-डाइमेथिलब्यूटेनाइक अम्ल (vii) बेंजीन-1,4-डाइकाबेल्डिहाइड
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