Sᴄɪᴇηᴄᴇ Aηᴅ Cᴏᴍᴘᴜᴛᴇʀ Nᴏᴛᴇs™ 🎲
Kanalga Telegram’da o‘tish
✍️© 𝗢𝗳𝗳𝗶𝗰𝗶𝗮𝗹™ ◇❖◇𝐓his Channel is Especially For Those Who Are Preparing For Government Exams.📝📝 ◇❖◇ 𝐇ere Provides U Top Important Exam Level Notes On Science And Computer Only. ❖◇❖𝐐𝐔𝐀𝐑𝐘&𝐏𝐑𝐎𝐌𝐎☎️☎️𝐎𝐖𝐍𝐄𝐑📲📲📞☞
Ko'proq ko'rsatish2 604
Obunachilar
-224 soatlar
-167 kunlar
-3230 kunlar
Postlar arxiv
When an apple is cut, it gets discoloured due to the presence of the
enzyme:
1. carbonic anhydrase 2. pyruvate kinase 3. polyphenol oxidase 4. nitrate reductase
The most electronegative element among the following
is -
(1) sodium (2) bromine (3) fluorine (4) oxygen
Sewing machine was invented by –
(1) Alfred P. Southwick
(2) Isaac Singer (3) Murasaki Shikibu (4) Hanaoka Seishu
What happens to its potential energy when an object is
taken to high altitude?
(1) Its potential energy increases (2) Its potential energy decreases (3) Its potential energy remain same (4) None of the above
Kilowatt-hour (KWH) is the unit of -
(1) power
(2) resistance (3) resistivity (4) energy
The conversion of hard water into soft water by boiling or
adding calcium hydroxide is called -
(1) Baker's process (2) Temp's process (3) Clarke's process (4) Lake's process
Ohm's law is valid in case of –
(1) semiconductor
(2) conductor (3) superconductor (4) insulator
The mass of water vapour per unit volume of air is known
as -
(1) relative humidity (2) specific humidity (3) absolute humidity (4) variable humidity
pH value [ pH value ]
️ What is the pH value of water = 7
️ What is the pH value of milk = 6.4
️ What is the pH of vinegar = 3
️ pH value of human blood = 7.4
️ pH value of lemon juice = 2.4
️ pH value of NaCl = 7
️ Who discovered the pH scale = Saranson
️ What is the pH value of acidic solution = less than 7
️ pH value of neutral solution = 7
️ pH value of alcohol = 3.5
️ pH value of human urine = 4.8 - 8.4
️ pH value of sea water = 8.1
️ pH value of tears = 7.4
️ pH value of human saliva = 6.5 - 7.5
Name the physical quantitiy that changes or tends to change the state of rest or of uniform motion of a body in a straight line?
1. Momentum
2. Mass 3. Force 4. Inertia
A _________ and _________ image is formed by an object placed in front of a convex mirror at a point between infinity and the pole of the mirror.
1. Real and enlarged
2. Real and diminished 3. Virtual and enlarged 4. Virtual and diminished
The ______ is connected in parallel in an electric circuit.
1. Voltmeter
2. Fuse 3. Galvanometer 4. Ammeter
Due to atmospheric refraction, sunrise is advanced and sunset is delayed by about
1. 1 minute
2. 2 minutes 3. 4 minutes 4. 3 minutes
A lemon kept in water in a glass tumbler looks bigger than its actual size, because of
1. Reflection of light
2. Diffraction of light 3. Internal reflection of light 4. Refraction of light
When the momentum of the body is doubled, the Kinetic energy of the body increases
1. Two times
2. Four times 3. Unchanged 4. Half
If you look into a mirror and find that your reflexion is smaller than you, then it is a type of
Which of the following electro magnetic radiations has the maximum energy?
👉🏼An artificial satellite can be tracked very precisely from the earth by using Dopper effect.
