Chemistry

Q911: pH is the logarithm of the reciprocal of the ______?

پی ایچ ______ کے باہمی تعاون کا لوگرتھم ہے؟

Phosphorus ion concentration

Phosphine ion concentration

Hydrogen ion concentration

None of these

Q912: If pure P orbitals were used in forming the B-F bonds in BF₃ angles 90° would be expected. The actual observed bond angle is 120°. What concept might be useful in explaining the observed angles?

Hybridization

M.O theory

VSEPR theory

None of these

Q913: Which technique is used to distinguish between imitation and pure diamond?

مشابہت اور خالص ہیرے کے درمیان فرق کرنے کے لئے کون سی تکنیک استعمال کی جاتی ہے؟

Microscope

X-ray

Refractive index

None of these

Q914: The smallest particle of the compound, made up of a group of atoms is known as:

کمپاؤنڈ کا سب سے چھوٹا ذرہ جو ایٹموں کے ایک گروپ سے بنا ہے اسے ______ کہا جاتا ہے

Molecules

Mixture

Alloy

Isotope

Q915: Is Inert chemical spice?

کیا غیر فعال کیمیائی مصالحہ ہے؟

N₂

O₂

Cl₂

None of these

Q916: Which of the following carboxylic acids is most acidic?

مندرجہ ذیل میں سے کون سا کاربو آکسیلک ایسڈ سب سے زیادہ تیزابیت والا ہے؟

Trichloroacetic acid

Chloroacetic acid

Dichloroacetic acid

None of these

Q917: A sample of dichloroacetic acid (MW = 128.94 g/mol) weighing 6.447 g is dissolved in water in a 500 mL volumetric flask. The resulting formality of the solution is?

0.100 F

1.056 F

0.599 F

None of these

Q918: Who was the first scientist to arrange elements in different categories?

پہلا سائنس دان کون تھا جس نے مختلف قسموں میں عناصر کا بندوبست کیا؟

Mendeleev

Faraday

Dalton

None of these

Q919: EDTA is called which ligand?

ایڈٹا کو کون سا لیگینڈ کہا جاتا ہے؟

Polydentate

Bidentate

Tridentate

None of these

Q920: When a nucleophilicity of a nucleophile, joined to an atom is found greater than expected is known as _____ effect?

جب کسی نیوکلیوفائل کا نیوکلیوفیلیسیٹی ، کسی ایٹم میں شامل ہوتا ہے تو توقع سے زیادہ پایا جاتا ہے _____ اثر کے نام سے جانا جاتا ہے؟

Gamma

Beta

Alpha

None of these

Q911: pH is the logarithm of the reciprocal of the ______?

Explanation

Q912: If pure P orbitals were used in forming the B-F bonds in BF₃ angles 90° would be expected. The actual observed bond angle is 120°. What concept might be useful in explaining the observed angles?

Explanation

Q913: Which technique is used to distinguish between imitation and pure diamond?

Explanation

Q914: The smallest particle of the compound, made up of a group of atoms is known as:

Explanation

Q915: Is Inert chemical spice?

Explanation

Q916: Which of the following carboxylic acids is most acidic?

Explanation

Q917: A sample of dichloroacetic acid (MW = 128.94 g/mol) weighing 6.447 g is dissolved in water in a 500 mL volumetric flask. The resulting formality of the solution is?

Explanation

Q918: Who was the first scientist to arrange elements in different categories?

Explanation

Q919: EDTA is called which ligand?

Explanation

Q920: When a nucleophilicity of a nucleophile, joined to an atom is found greater than expected is known as _____ effect?

Explanation

Chemistry

Q911: pH is the logarithm of the reciprocal of the ______?

Explanation

Q912: If pure P orbitals were used in forming the B-F bonds in BF₃ angles 90° would be expected. The actual observed bond angle is 120°. What concept might be useful in explaining the observed angles?

Explanation

Q913: Which technique is used to distinguish between imitation and pure diamond?

Explanation

Q914: The smallest particle of the compound, made up of a group of atoms is known as:

Explanation

Q915: Is Inert chemical spice?

Explanation

Q916: Which of the following carboxylic acids is most acidic?

Explanation

Q917: A sample of dichloroacetic acid (MW = 128.94 g/mol) weighing 6.447 g is dissolved in water in a 500 mL volumetric flask. The resulting formality of the solution is?

Explanation

Q918: Who was the first scientist to arrange elements in different categories?

Explanation

Q919: EDTA is called which ligand?

Explanation

Q920: When a nucleophilicity of a nucleophile, joined to an atom is found greater than expected is known as _____ effect?

Explanation

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