Chemistry

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Q631: Which one of the following principal quantum numbers has largest, s orbital?

مندرجہ ذیل میں سے کون سا پرنسپل کوانٹم نمبر سب سے بڑا ، مداری ہے؟

n=4

n=3

n=2

None of these

Q632: The amount of Chromium in stainless steel is _____?

سٹینلیس سٹیل میں کرومیم کی مقدار _____ ہے؟

18%

25%

None of these

Q633: The element having valance shell electronic configuration is 3s² 3p⁵ that belongs to _____?

2nd period, VA group

3rd period, VIIA group

5th period, IIIA group

None of these

Q634: Bohr model defines angular momentum as 1= nh/2π, but in Schrodinger wave mechanics it is ______?

√l(l + 1) h/2π

√l(l + 2) h/2π

√l(l + 3) h/2π

None of these

Q635: The radioactivity due to C-14 isotope (half life 6000 years) a sample of wood from an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about _____?

12000 years

6000 years

9000 years

None of these

Q636: An atom of Iron is ______ times as heavy as atom of hydrogen.

لوہے کا ایک ایٹم ______ بار ہے جس میں ہائیڈروجن کے ایٹم کی طرح بھاری ہے۔

238

1638

None of these

Q637: Oxime is also known as _____?

آکسائم _____ کے نام سے بھی جانا جاتا ہے؟

Cyanohydrin

Formaldehyde amine

Acetaldehyde amine

None of these

Q638: All of the following are covalent network crystals except? a) SiO2 b) Graphite c) Ss d) Diamond

SiO2

Graphite

Diamond

Q639: Cola seeds contains quantities of _____?

کولا بیجوں میں _____ کی مقدار ہوتی ہے؟

Morphine

Nicotine

Caffeine

None of these

Q640: Which noble gas is highly polarized? a. Helium b. Argon c. Krypton d. Xenon

کون سی نوبل گیس انتہائی پولرائزڈ ہے؟

Helium

Argon

Krypton

Xenon

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Chemistry

Q631: Which one of the following principal quantum numbers has largest, s orbital?

Explanation

Q632: The amount of Chromium in stainless steel is _____?

Explanation

Q633: The element having valance shell electronic configuration is 3s² 3p⁵ that belongs to _____?

Explanation

Q634: Bohr model defines angular momentum as 1= nh/2π, but in Schrodinger wave mechanics it is ______?

Explanation

Q635: The radioactivity due to C-14 isotope (half life 6000 years) a sample of wood from an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about _____?

Explanation

Q636: An atom of Iron is ______ times as heavy as atom of hydrogen.

Explanation

Q637: Oxime is also known as _____?

Explanation

Q638: All of the following are covalent network crystals except? a) SiO2 b) Graphite c) Ss d) Diamond

Explanation

Q639: Cola seeds contains quantities of _____?

Explanation

Q640: Which noble gas is highly polarized? a. Helium b. Argon c. Krypton d. Xenon

Explanation

Chemistry

Q631: Which one of the following principal quantum numbers has largest, s orbital?

Explanation

Q632: The amount of Chromium in stainless steel is _____?

Explanation

Q633: The element having valance shell electronic configuration is 3s² 3p⁵ that belongs to _____?

Explanation

Q634: Bohr model defines angular momentum as 1= nh/2π, but in Schrodinger wave mechanics it is ______?

Explanation

Q635: The radioactivity due to C-14 isotope (half life 6000 years) a sample of wood from an ancient tomb was found to be nearly half of that fresh wood. The tomb is therefore about _____?

Explanation

Q636: An atom of Iron is ______ times as heavy as atom of hydrogen.

Explanation

Q637: Oxime is also known as _____?

Explanation

Q638: All of the following are covalent network crystals except? a) SiO2 b) Graphite c) Ss d) Diamond

Explanation

Q639: Cola seeds contains quantities of _____?

Explanation

Q640: Which noble gas is highly polarized? a. Helium b. Argon c. Krypton d. Xenon

Explanation

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