Class 10th Exam

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Class 10th Exam

Chapter = Halo alkane - Halo arine

Jee me bohat bar puch chuka he iss concept k upar . Neet me ane k chance jyada he .

Here , to compare the stability of primary alkyl halaide in Sn¹ rxn =
☆ do not use rearrangement of carbo cataion

Use =
⇘ Inductive effect dominant over H effect
⇘ β branching increase

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Class 10th Exam

58 views22:53

Class 10th Exam

✔️Important SCIENCE (CHEMISTRY )

✅. Gases used in welding are ?
– Acetylene & Oxygen

✅ Gases used by sea divers for breathing are ?
– Oxygen & Helium

✅. Best sources for Vitamin D are?
– Sunlight & Fish liver

✅Zinc Phosphide is used as?
– Rat Poison

✅. Fuse wire is made up of
– Lead and Tin

✅Purest form of Iron is?
– Wrought Iron

✅ Radium is extracted from .
– Pitchblende

✅ Which agent is as ‘seed’ in artificial rain?
– Silver Iodide

✅. Oxides of metals are .
– Alkaline

✅ During the process of ‘rusting’ , the weight of iron .
–Increases

✅ (metal) is liquid at room temperature.
– Mercury

✅ What is the formula of common salt
– NaCl

✅. What is the maximum number of electrons that a p-orbital can hold
– 6

✅. What is used in fire extinguisher
– Sodium bicarbonate

✅ What is the nature of metal oxides
– Basic

✅. Which gas burns with popping sound
– Hydrogen

✅ Which metal is used for galvanization
– Zinc

✅. What is the nature of bleaching powder
– Oxidising agent

✅ Which is stored in Kerosene
– Sodium

✅ Phenolphthalein gives which color in acidic medium
– Colorless

✅ Which gas is used in cigarette lighters?
– Butane

✅. Biogas chiefly contains .
– Methane

✅. Chemical used as fixer in Photography is .
– Sodium thiosulphate

✅Aspirin is
– Acetyl Salicylic Acid

✅ is also known as ‘Stranger Gas.’
– Xenon

✅ Natural rubber is a polymer derived from .
– Isoprene

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Class 10th Exam