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  Schools across state won’t reopen before Diwali: Maharashtra Govt. Mumbai: With Covid-19 positive cases showing no signs of slowing down in Maharashtra, the state government has decided to allow schools to reopen only after Diwali. This means children in over 1.2 lakh schools won’t be able to attend classes in person till November. Minister of School Education Varsha Gaikwad said the decision was taken after a meeting between her department and several school managements. Since schools are not ready to risk the lives of their students, the state has planned to push the reopening after Diwali, she said. Gaikwad said the Centre had sought the state government’s views about the resuming classes in schools for senior students. She said the Centre had also issued standard operating procedures or SOPs for the partial resumption of teaching activities in schools for students of Classes 9 to 12, on a voluntary basis, from September 21. Advertisement Advertisement “However, school managem...
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Schools to reopen this month, but parents remain worried & experts advise caution

  Schools to reopen this month, but parents remain worried & experts advise caution Shorter hours, reduced strength, masks & sanitisers will be the norm when schools reopen, according to SOP announced by the Ministry of Health & Family Welfare. Delhi: The Ministry of Home Affairs issued guidelines for Unlock 4 on 29 August, permitting partial reopening of schools from 21 September. “Students of classes 9 to 12 may be permitted to visit their schools, in areas outside containment zones only, on a voluntary basis, for taking guidance from their teachers,” said the guidelines. Students will be permitted to go to school only with prior written consent from parents and only 50 per cent of the teaching and non-teaching staff will be called in. Shorter hours, reduced strength, masks and sanitisers will be the norm as per standard operating procedure (SOP) released by the Ministry of Health and Family Welfare. Also read: Bengaluru private schools want to charge students ‘Covid ...
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Reproduction in lower and higher animals. Exercise

  Q1. Multiple Choice Questions . The number of nuclei present in a zygote is …… a. two  b. one c. four d. eight 2. Which of these is the male reproductive organ in human ? a. sperm  b. seminal fluid c. testes d. ovary 3. Attachment of embryo to the wall of the uterus is known as…….. a. fertilization b. gestation c. cleavage  d. implantation 4. Rupturing of follicles and discharge of ova is known as ………….. a. capacitation b. gestation c. ovulation  d. copulation 5. In human female, the fertilized egg gets implanted in uterus …………………. a. After about 7 days of fertilization b. After about 30 days of fertilization c. After about two months of fertilization d. After about 3 weeks of   fertilization 6. Test tube baby technique is called……… a. In vivo fertilization b. In situ fertilization c. In vitro fertilization d. Artificial insemination 7. The given figure shows a human sperm. Various parts of it are labelled as A, B, C, and D .Which labelled part represents...
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School, college reopening

 School Reopening Update: Health Ministry Issues SOP For Partial Reopening Of Schools For Students Of 9th To 12th Classes On A Voluntary Basis - Download SOP & Check Details! School Reopening News & Updates! School Reopening Update: Health Ministry has issued SOP (Standard Operating Procedure) for reopening of CBSE & other schools for classes 9th, 10th, 11th, & 12th voluntarily, for taking guidance from their teachers in the context of COVID-19 (This will be subject to written consent of their parents/guardians). However, this will be allowed from 21st September onwards. All the information has been published on the official twitter account of the Ministry of Health & Family Welfare. Students and others who are wondering about the school reopening date in India can check all the details. No updates have been provided for the students from class 1st to 8th. School Reopening Update -  Main Points from the SOP: Generic Preventive Measures The generic pr...
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Solid state

                     Solid state            Exercise part 2. Q no 2) Answer the following in one or two sentences (i) What are the types of particles in each of the four main classes of crystalline solids ? Answer : Types of the particles in each four main classes of crystalline solid are : – Ionic Crystals Covalent Network Crystals Molecular Solids Metallics Crystals (ii) Which of the three types of packing used by metals makes the most efficient use of space and which makes the least efficient use ? Answer : Close packing efficiency is maximum in the crystal lattice of Face Centered cubic (FCC) unit cell and it is minimum in the crystal lattice of Simple Cubic unit cell. In the crystal lattice of Face Centered cubic (FCC) unit cell the packing efficiency is 74 %. In the crystal lattice of Simple Cubic unit cell, the packing efficiency is 52.4%. (iii) The following pictures show population of bands for...
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Solid state

 Solid state.                       Exercise. Q.no 1 :-   I) Molecular solids are....        a. Crystalline solid.    b. Amorphous solid.    c. Ionic solid.    d. Metallic solid.   II) which of the following is n-type semiconductor?    a. Pure Si.     b. Si doped with As.    c. Si doped with Ga.     d. Ge dopped with In. III) In Frenkel defect      a. Electrical neutrality of the substance is changed.     b. Density of the substance is changed.     c. Both cation and anion are missing.     d. Overall electrical neutrality is preserved. IV) In crystal lattice formed by bcc unit cell the void volume is    a. 68%    b. 74%     c. 32%    d. 26% V) The coordination number of atoms in bcc crystal lattice is   a. 2   b. 4   c. 6...
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Solid state

                   1. Solid state.  (Primitive/simple cubic unit cell):- -Has particles at its eight corners. -Each corner particle share's it's all seven parts to other unit cell to form crystal. -so, only 8th part comes under crystal. -So, 1/8×8 ( corner ) = 1 particle per unit cell. Body-centred cubic unit cell :- -In bcc unit cell, -[1/8th (part of single unit corner) × 8 + 1 × particle at body ] = 2 ( particles ) Face-centred cubic unit cell :- -In FCC,  -[1/8th (given unit cell at corner)× 8 + (1/2×6 face)] - [1+3] - 4 particle. Packing of particle in crystal lattice :- - Particles are closed packed in crystalline solid. - Always individual particle is treated as hard sphere. - The number of neighbouring spheres that touch any given sphere is its coordination number. -Magnitude of coordination number is measure of compactness of solid. - Larger the coordination number, the closer are the sphere to each other. 1) Close pac...
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